give up??? never!!

ok, I look at this site now and then for the past like 7 years... I have only posted once or twice, but i need some real support now... ok 3 totally diff situations 1) I have a 6 year old that I got 2 years ago, she left 2 days before christmas because mom "worked the case plan" which I really don't beleive she did at all, but at any rate, mom asked me to keep child for the summer while she finds a place to live. She got kicked out of the homeless shelter after being there for 9 months, so now she has no where, she has no car, no job, no house, no belongings, no money, she is not physically abusive, but was/is very neglectful, roaches, no power, food is chips/soda, child doesn't wear seatbelt and sits in the front seat. when I got her at 4 1/2 she had to have 4 teeth removed/and other major work doen, but mom cont to feed her candy and junk, she brings her around a person who was arrested for child abuse on the child, but makes her lie to cw's telling her she will go back to fc, mom loves her but she doesn't have the capacity to care for her child... i have had her every other weekend since reunification, a week for spring break and now since the last day of school.... ok so now.. mom has found a new place to live, she is soooo manipulating that they think she is just fine... this child fills my ears every day.. she don't even realize all the horrible things she tells me, she loves her mom but she doesn't know how bad this is.... she is suppose to be going home soon.... mom always lets me see her/talk to her when ever i want and i sooooo much value that and I don't want to mess that up... I have begged cw and supervisor to really look into this, and they say they will.. but they also say they have to get this case closed as we are coming up on 2 years now...she was not removed this time, she just had a placement change for now.. so do i write to the judge do i keep pushing or do i let the cw do their job, and be there to pick up the pieces.... I know you all can relate, but i love this child... 2 years now... and mom has done nothing.. secondly, i have a 14 year old, she moved in w/ us last sept, she is a handful, she has lied, stole, sneaks out, sexually overly active, has been arrested multiple times, has to go to a alternative school, failed a few drugs test, made at least 2 false allagations on me and really I could just keep going....however, I refuse to give up on her... she has had a crappy life and everyone walked out on her, i promised her i would not walk out on her no matter what... she is now in a treatment center 8 hours away and wants me to come see her (often) she just got there a week ago and already is flipping out because i am not there yet (she doesn't know yet, im coming this weekend) but anyway, i will not give up, I have made a commitment to her and I will stand by that, but how do I make others understand what these kids need?? I cringe when ppl say," oh you dont need that in your life" i mean she didn't need a lot in her life... why don't ppl understand the need for these kids to have a least just one person who really won't give up on them.... ok, lastly and I know this is way tooooo long... I used to have a 16 year old with me, she is 17 now and moved to another home, but we have remained very close, she has had a HORRIBLE life, she has been in well over 100 homes, she is not close with any other fp in the past, just me... i see her now and then and talk/text her a lot, but her fp allows things i don't support. she is clearly on drugs and has recently over dossed... This week, she has called me 2 times and asked me to western union me some money because fp went out of town and left her with no money. although, i beleive she did probably leave her there and go out of town, i also beleive she wants money for drugs and I can not and will not send her money for drugs. I dont' want her to think im not here when she needs me but, i know if she needed food money like she said, she would be calling her fp not me....i told her no and of course she is mad... i want to talk to the fp but she won't have my back and then the child will not tell me anything or come to me... any idea's on any of these things would be sooo much appreciated...