EDGARS ACCOUNT RCS CHAOS

I bought 2 items last year sept 2020, returned one item to be credited at The Grove Mall. I have tried to sort this account for the last few week and eventually got a reply from a lady called Bianca from edgars enquiries(RCS) apologising and in writing showed wat was owed and the credit will be passed. I then went to the Edgars store to pay my account as per her email, just to find out that the system still do not show the credit, in the meantime they have added interest, collection fees and who knows what else. Oh, before I forget, they changed my surname on the account, wow..,,,did not know that that is legal. Since the day I made contact I started getting 3 to 4 phone call regarding settling my account, still with he incorrect amount. Now for the last few days I have RCS lawyers phoning me...please Mr Regan Adams sort you company out. It is chaos!!!!!!. If I do not get a reply, I will take this to every newspaper, social media and get my lawyer involved.... I get harassed but your house is not in order...I have sent 10 mails and all I get is reference numbers and automated replies or how busy the company is.