Daughter seeing her dad

My 2 year olds daughters father and I spilt about 1 year ago now and since the split he hasn't really shown any interest in her at all unless his parents make him do something. He's never paid a cent of child support either. He lived near us for a while but has just moved away. Iv always gone out of my way to make them see each other ( taking her to him, and waiting around for hours so they can spend time together ) but then I had enough and said if he wants to see her he has to make the effort I was over being pushed around and abused. We have tried mediation a few times and he won't agree to anything other then him having her 7 days a week ( so he doesn't have to pay child support ) he's told me. I will not agree to that because she hardly copes with the weekend away. Iv told him he can call her whenever he likes and see her whenever he comes to visit his family here.
Every time he has her, he palms her off to his parents and goes out. They don't care when she goes to bed, she usually stays awake until 12am and they feed her garbage. She goes to bed at 6 here and we have a very strict day/ night routine with her.
She comes home so disstressed and different. She swears and is just nasty, comes home grubby and usually sick or with blisters and scratches over her So she's always out of place when she comes home ( usually goes for the weekend every few months ) there's so much more but I'm trying to keep this short. I just don't want my daughter to have a man in and out of her life when he pleases! I'm worried about how they are with her, taking her to parties etc when she should be sleeping! My life is just constantly me stressing over her! What would other mums do in this situation I'm so lost!?
After being brought down and made to feel like I'm nothing for 8 years we were together I have undergone numerous cousilling sessions, but nothing is working! I was diagnosed with depression and anxiety a few years ago but it's gotten so much worst since the split because I'm always worried and on edge. Iv recently finally agreed to go on medication because I'm spending my days shaking and having panic attacks. My whole life is consumed with worry about her. I need some advice! I'm so lost!
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His parents also harass me daily with phone calls trying to boss me around I used to answer them but it's getting to much.
Like I said if it wasn't for his parents wanting to see her he wouldn't have her at all! We also have no court orders or anything in place.
I honestly feel like the best thing for her now is to cut all contact completely.
Please no harsh comments.