Edgars *********** billing team

I have struggling to close my Edgars account. The customer care team is 100% *********** and all I want is to close my account. They have take 3 months to allocate a payment and keep charging collection fees, interest and late payment fees when the account has been up to date. If anyone has any advice on who I can mail to sort this out please let me know. I have had it!