Edgars and rcs incompetence

Hi ever since edgars changed ownership in September 2020.I received sms that Edgars account will be interest based. I went to Eastgate store to return items purchased. And paid the expected balance of my account as edgars could not give me total outstanding amount owing. I was told that in 24-48 hours I will be able to get balance owing as credits on returned items will reflect. I called rcs on numerous occasions emailed rcs. Visited Eastgate store on numerous occasions spoke to store manager and customer service agent who has ensured me that emails were sent to rcs. They even showed me the many emails sent to rcs. I have received many threatening calls from rcs. When I asked call center agents for manager available to resolve the issue I was told that they were working from home and manager will call me back but to no avail. Really frustrated with the service.