Disgusting Service on trying to reslove Account Query Edgars and RSC

I purchased a phone on the 24th July 2020 using my Edgar's Account. After a few days the phone gave me issues, i then followed the process of the phone being sent for as*****t to see if it was faulty. After a few weeks i received a response to say it was faulty and they they will pass a credit. So i contacted the store which was Edgars Greenstone and went to get a refund on the 28th August. 2020. They processed the refund back to my account. The balance i had left on my Edgars account was R286 after my credit, which was correct as this was my balance before i could buy the phone. So i went to Edgars Eastgate a few days later to pay off my balance and to my suprise my refund had disappeared and they said my balance was over R10 000. Which i disputed as i no longer had the faulty phone as it was returned to the supplier and I contacted Edgars Greenstone. Let me tell you since the 01st of September 2020 it has been such a struggle getting hold of Edgars accounts personel and RCS as they have taken over Edgars account queries. I have spent hours every week holding on for assitance speaker to consultant after consulatnt explaining the same story over and over again sending mails to ***, *** with proof of my till slips, i have left so many messages for a senior supervisor to call me back to reslove this and guess what no one has contacted me to reslove this query, everytime they say they will call back with feedback, there is nothing, but mind you i have recieved numerous calls to pay my account and they handed me over because i am bad payer!. How can i pay for something i dont have which i was refunded for and have explained this to the collections consultant and even asked them to escalate. They have charger me intrest on a balance and an instalment that is incorrect and, listed me as a bad payer. I have now escalted this my self directly to RCS group, the Ombudsman and a lawyer. Which ever company is responsible for this, needs to sort this out ASAP, reverse the intrested and remove me off as a bad payer. I have had enought now, it has cost me over R1000 rand in calls to sort this out and no resolution. All calls are recorded, so they must go find the recordings and sort this out.