Should I force visitation or try to do things that create a desire to come visit me?

I have 2 girls 7 & 8 I am trying to decide if I want to force visitation on them or grant them not wanting to see me. I have been making an effort to see them more the last year. I felt this desire to see me was mutual. I wasn’t getting returned phone calls from mom to allow this to happen. Waiting 4 weeks for this call (the last time), I started a court case to help eliminate the confusion of when to see the girls. Then the girls expressed their hatred (I know it’s a strong word, but it’s on paper) for me and have said they don’t want to go with me and hate that I am forcing this issue on them. My desires were never to force them to love me, I just felt they weren’t being allowed to and felt I would give them the opportunity. Do I force them or can I rebuild a relationship through doing things like, letters (every letter I write they have to at least write their name on paper and send it to me) and letting them know that I am here when they want to come visit hoping that they will decide to come in the future.