Very Bad service experience and complain

On the 29 March 2022, I went to Markham polokwane to purchase R1000. 00 electronic voucher to my spouse who stay in Germiston to redeem it that side, on the 30 march 2022 when she went to the store around 10:00am she was told that the voucher has been redeemed at the very same shop which it was purchased Markham and she called to inform me about that, I requested to speak to store manager Tshepo at Jet branch 45521 and told me that voucher is left with R15. 00 I used R985.00 at Markham, I went to Markham to prev day purchase sheet and there was purchase made by that voucher, I called while I was at Markham store to inform him about that, and called customer care they told him that voucher has been used. I requested number for customer care, and used more than R300. 00 airtime to make a call which took me more than 2 hours explaining to them about product "electronic voucher" and asking them on how can it be possible to purchase at polokwane while sms was sent to Germiston and received and why is it not appearing on their daily purchase sheet and after regaling lack of product knowledge from agent who was helping me I requested supervisor and told me that there is an error on their system the voucher was not used and they have sent my spouse a new voucher. She went Jet again voucher was not sent, then she went to Markham in Germiston they also told him is used and they can't do anything. On the 30th she went again voucher was not there and she is using transport to go there. On the 04 April 2022 I went to Markham in polokwane to seek help about the same matter then I experienced a very bad service where by they called manager who was on a personal phone call on a loud speaker I told her that I'm not happy I will report her conduct and she told me to go ahead and the 05 April 2022 she came to apologised and said will help me, I gave her all the info and case no CS-671637 for the 29 March 2022 but she couldn't even today I did not receive voucher but I'm bering debited. I don't want this voucher any more, it must be returned back to my account.