Pick and pay RCS store account

I have a pick and pay srtore account with rcs. I have for many years no issue. I wanted to update my cellphone number and for some reason they blocked my account so i had to keep paying but cant use it. I sent multiple emails no respons. If they do respond its weeks before they respond again. They asked me for a copy of my id and 3 signatures. I sent it. Never heard any thing back.that was about 3 mk ths ago. In January iasked them what is my total amount i want to close my account.They sent me the amount i immediately paid it. No response. Cant get though to them. Now they say they will have to wait till net billing date then they will close it, which means i am going to have to pay in another amount. Then they are going to take forever again and wait for me to make payment again and again and again. I just want to close it