Really poor service

Trying to close my MRP account for more than a week now. First went into the store on the 25th of July 2020 (Saturday) and paid my account up to date, account balance showed R0. I asked the lady at Mooi Rivier Mall MRP to call the head office and close my account. She told me that I must wait 24 Hours until the payment reflects on their account. I did wait until that Monday morning the 27th of July 2020, called ***the phones keeps cutting off, called all the customer and credit numbers , even tried the whatsapp no assistance. Emailed them 3 times, finally got a call back on Thursday , telling me I cant close my account as I overpayed and I need to get a voucher or a refund. I went in on Saturday the 1st of August in Lichtenburg store, to redeem my voucher of refund. Nothing showed on the system they called head office, after 1 hour of being on hold, they told the cashier to make a voucher out. The cashier tried, did not work, called head office again, again on hold for 1 hour. AFter that head office said they cant give the voucher as there is still a purchase of LAST YEAR AUGUST 2019 that they need to cancel. So I waited 2 hours in a store again for nothing. They told me to call today and ask if everything is sorted to get the voucher / refund. Called twice phone is still not working. Emailed, no answer. I dont know how / when will my account finally be closed?! Really poor service from headoffice.