Customer services at Edgars

I opened an account at Edgars on the 6th June 2024 and had a credit of R3000 given to me.I purchased goods for the full amount.The agreement was to pay my installments 6 monthly first installment being due on the 4th July..The installment would be about R 500 per month.Edgars then put in a debit order on my bank account three days later 10th June for an amount of R851.00.I has not made any provisions for any amount of repayment in the very first week of opening account.I was then charged a fee by bank for R147.When I called Edgar's I was told my account was blocked because I was in arrears from the 1st June.I hadn't even been at Edgars till the 6th June.Then then said my account owing was now R3900.I only had a credit of R3000.I have made several calls explaining to 7 different consultants the same mentioned here and every single one sympathized with me and promised to escalate the matter and get managers to call back.Its now the 26th June and nobody has bothered to attend to the query.I was an account holder less than a week and already I have a bad credit record. What do I do please help me