No refund for duplicate payment.

On the 14 July 2022 I was charged twice at McDonalds Ottery Cape Town branch and I informed that cashier immediately who rep**** that it will reverse automatically within a day or two. To date no refund reflects in my account yet even though I raised queries with the branch manager twice and on their website. I was informed via email and telephone call that it was sorted and by the branch. I asked for proof of the refund but no response or feedback .. absolutely disgusting service,. I as a pensioner cannot be going back and forth and find this unacceptable.