Understand your difficulties. Many 99 like to give hard time to us, not just you. Also many mami are in a even worse situation than you. So don't give up.
Also your 99 is the one who takes care of your daughter, you can't really control how she does it, but I think she won't do bad things on your daughter - still her granddaughter.
You should now work hard, save more $$$, so that later you can afford to employ a maid / to take care your daughter yourself.