Flash Trader Voucher

I purchased a R500 Flash Voucher from Ackermans today. When trying to load the voucher it said the account was closed. I called the support centre who said the ***** department closed the account due to an issue last year which to my knowledge had been resolved. The issue last year was due to the fact that I had purchased 2 vouchers of the same amount on the same day. I sent all documentation requested and was then allowed to proceed with using the account. Now today I am told it was not resolved because I had not sent all the documentation they requested. I am not reselling the product. It is purchased for my own private use. I am now told I need to provide the slips from October 2018 in order for them to resolve the issue. When I asked how I could get my R500 back I was told to take the voucher back to Ackermans or sell it on to someone else when all I really wanted was to load airtime on my own private phone. I was placed on hold numerous times and then ran out of the airtime that I had left. I was not able to load more airtime due to the account being "closed" and nobody returned the call. The whatsapp number that was given does not respond to message either.