Poor Service and *********** Manager Wimpy Mall of Africa

I went to Wimpy Mall of Africa on 29 October 2022 @16h10 to 17h37. I went with the voucher offered for my birthday, the lady at the till checked the voucher & processed everything. After waiting for more than 30 minutes, I was then informed there's a problem, she kept scanning/printing invoices over & over without any success.

What really disappointed me was manager's/supervisor's comments that there's nothing she can do because the bill is not closing on her side, accusing me of why I took screenshot of the said voucher (reason I showed her screenshot was because she insisted that the voucher must have expired & luckily I took screenshot on 25 Oct 2022), so basically she was suggesting I'm de*****ing Wimpy with an expired voucher. Cashier decided to scan more than once & unfortunately the manager was blaming me about that as well & when I asked the cashier to explain that it was her who did that, she told me straight she doesn't want to get involved & managers decision is final & i must move as she wants to help other customers.

After trying to explain for more than 30 minutes with embarrassment in front of other customers I asked her to forget about everything and I will just lodge a complaint with Wimpy, only then she suggested I sit down and she will buy it for me (in a sarcastic & disrespectful manner). I refused as it had already been more than an hour discussing same thing. At that time I already spent 1h27 (one hour 27 minutes) without assistance and already missed my next appointment for 17h30. The behavior of the Wimpy Mall of Africa staff including the senior manager is so unprofessional, unacceptable and disrespectful. I left a note on Wimpy website and emailed *** they did not even respond