Can I go to the courts to file against the grandma for not following orders

Grandma got temporary custody of my child for domestic violence between me and father. I was ordered to continue domestic violence counseling which I am and pay child support which is auto deducted out of my check.it also states I can get two phone calls a week and supervised visits.as the mom I reached out numerous times .the grandma changed her number and even hung up on me preventing me from talking to my child.its very sickening because it was her sin that abused me but she allows him to talk to his child and even take her when we both have the same orders.I can't afford an attorney so I'm out her cold turkey with the help of the good Lord and churchhis mom talks bad about me in front of my child and I feel she doesn't have the best interest for my child. Do I go write a letter