I have a bangladeshi dating app. My account got banned, I suspect that I have not intregrate google play billing system. I request an appeal for that. I need assistance on this

I have a bangladeshi dating app. My account got banned, I suspect that I have not intregrate google play billing system. I request an appeal for that.
But I want to implement additional billing in my app. I want to setup user choice billing system in my app, I will handle the development part , I need an assitance for the policy and setup