Can't Keep Accounts Straight

I was told that my account was in arrears, after having been called, I told them I had paid and they gave me an email address that bounced. I am STILL being told that my account is in arrears. I have emailed [Email Removed] 3 times regarding this and have gotten absolutely no feedback! This is pathetic. I HAVE paid, on the 4th of May. You are harassing a customer who has always paid. I used the payment details on YOUR official website! I will be closing my account after my payments have been made. You have lost a customer in me.