Refund

I bought an item at this store about 3 weeks ago,as I was paying/swiping my card ,they decided to reboot their systems.Payment went off on my side but it seems it didn’t reflect on their side as there was no proof of purchase.The store manager insisted that I must make a second payment as the first payment will definitely be reversed after an hour or so.I was hesitant but ended up paying again since I needed the item I was buying.I went to a few stores at the mall, after an hour and a half I went back to say the initial payment is still not in my account,she re-assured me that it will be reversed.It was on a Saturday.The next Tuesday I went to the store since my money wasn’t in my account.They told me they need to log a call,I have to send a statement for them to do that,I did as I was advised and till today I haven’t received my money back.I am taken from pillar to post every time I call the store.