Appalling Treatment

My credit card is over limit and I made payment on the 26th of June for both my credit cards. I was then debited on the 27th of June of which I reversed these because I had already made payment - Please advise why am I in arrears and over limit because you did not communicate that you would debit me on the next working day and this is a service failure from you now that I need to pay for. That is not fair. I was put through to someone in your collections team who did not even bother calling back when the call cut.