My 3 children's father changed his number after I sent him this message?

Anonymous
My 3 childrens father changed his number after I sent him this message?
So, my ex has been pretty MIA for going on a year and 2 months. He was taking the kids every other weekend but in June 2019 he stopped and he has only seen the kids 5 times since that point. Four times of which his mother actually asked for them and he just happened to be there.

My babies are 9, 7 and 4 years old. They ask for him constantly and I'm not sure what to tell them without making it sound like their dad doesn't want to see them. The last text pictured above is what I sent him on this past Friday. On Saturday, his cousin sent me a screen shot of his fb post (he has me blocked) that said "New number lmk if you want it". Also, not pictured, are 11 other texts that I have sent him since the last time he saw them (2 months ago) that he never responded to. Including texts telling him that the kids would like to call him.

I'm unsure of what to do here and I'm curious what you guys think. A huge part of me wants to be petty and ignore him and his mother when they text me (they usually will take them once every 3 to 4 months) because of how much they have ignored me.

I have been trying to take him to court for 2 years but the date keeps getting postponed and now there isn't an opening in the court house until nearly March of 2021. He refuses to pay child support. He lives at home with mommy and doesn't pay rent or have any responsibilities aside from his phone.

I'm just curious what y'all think I should do here because I'm truly at a loss and so very tired of fighting for him to see his kids when it's obvious that it isn't a priority to him.
My 3 children's father changed his number after I sent him this message?
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