Pick n Pay Bottles App debited my account until there was nothing left to take

I used the Pick n Pay Bottles app on Thursday last week to get some groceries since I was stuck without transport and delivery is free on the app (super convenient!). Unfortunately, the convenience stopped there. Their system was having behind the scenes issues and my account was debited 3 times while my order was not showing as accepted. My order was eventually accepted a few minutes later unknowingly and my account was debited 2 times further! This then led to my account being practically empty which then costed me further as Capitec hit me with insufficient funds fees. I called the bank as well as Pick n Pay to rectify the issue and get refunded but they could not help me since their system was having issues and they couldn’t get in on their side to see and fix the problem. I was told I’d get a call back to keep me updated on the status of the problem, it’s Monday, 4 days later and I have yet to receive a follow up call. I am truly disappointed in the manner in which the situation is being handled. I am now penniless and have no knowledge about when or if I’ll be refunded.