Disappointing service by FNB

I am disgusted with FNB’s service, i bought 2 R100 1Vouchers on the FNB App and i did not receive the voucher codes but the money from my account was deducted. I have reported the issue on the 25 April and they have acknowledged that there was such a purchase and there was a technical issue with the system at the time of purchase hence i did not receive the codes. I have been told that the money deducted from my account will be refunded till today i have not received any money.