Incorrect Account balance

I sometimes use my cellphone app to pay my Edgars account, for about a year now. In April obviously due to rhe Lockdown I had to pay online. I paid the account, settled the amount (R1270) but to date they have not removed it from my account, instead my account just keeps increasing. I've contacted Edgars from May regarding this, I've been to the store 4 times already (Lochlogan Waterfront), I've sent Proof of payment but I'm silll sitting with this debt.