Edgars - Payment not allocated

Paid my account from April to June. Paid more that I owe. Went to Edgars store beginning of June to get new RCS card. First my account was blocked for resons not given to me. Then I find out that my account is behind. Sent through my bank payments like requested by the account department. We are almost a month past the request. After numerous phone calls in store and private, no joy! This frustrating. Every time they say: the will escalate the call. Nothing happens. They add extra charges to my account for not paying although I paid more that what I owe. My credit score is taking a tumble due to this! Can I get help?