POOR CUSTOMER SERVICE FROM JET/RCS!!

I want to complain about treating the customer unfairly. On the 19th December 2020, I visited the jet store in Town center Mitchell's plain and bought items to the value of R2759.78 at that same time the store went offline without me signing anything and it reflected on my phone as a purchase and then the consultant kept the items purchased and I said I would only available on the 20th December 2020. I went back to the store on the 20th December 2020 as promised. they then rang the items up again only to take the available credit of R2976.00. They did not even check if the purchase went through on the 19th December 2020. So ever since I have been getting the run around from RCS and Jet even though Jet logged an issue. On RCS's side they cannot escalate the problem, their management team does not want to assist on the phone they are saying the complaint is in the queue but cannot give me a reference number. They say it takes up to 48 hours to sort the problem but ever since the 19th December 2020 I have been getting no service, I would like to know what Jet and RCS customer service relates to TREATING the customer fairly. I would like this issue to be resolved because as a pensioner their service is pathetic. They have been telling me the team leaders are in training and COVID 19 and also Skeleton staff, how does this concern me as a client. WHAT HAPPEND TO CUSTOMER SERVICE!!! My installment should also count, because I cannot make excuses at the end of the month for late payments and this issue is effecting my credit record. I am 72 years of age and I am getting the run around and being treated in that way. Hope this matter would be escalated as I am a customer for over 20 years. Contact MRS Sampson ***, I will not rest until this matter is resolved.