It's taking McDonald's East Value Mall 2 weeks to respond to a query?!!!

I had to pay twice at McDonald's East Value Mall for my purchase on the 28th of August 2022 because the lady that was helping me at the drive through said the first payment did not go through. After checking my phone I realized both payments did go through and I showed this to her. She then took my details "to have her Manager call me", nobody called me until I went back to the shop 3 days later to ask if I would be getting a refund. I was given an email address to send my details to (again). I sent my details via the email and nobody responded to that email...

I went back to the shop again this week on Monday and was told the email had been sent to head office, I sent another email again today to follow up and still no answer. The shop called me but when I answered they immediately dropped and I called back 3 times, no one answered. It can't possibly take 2 weeks to get a mere response?!