Bring Back My Money NOW

I placed an order on the PnP App on the 25th of Nov at 15:00, only for them to change the delivery time to the following day at 09:00. The following day at around 09:00 I get an app notification that my order has been cancelled, no courtesy to call me or anything in that regard or even the reason why it was cancelled. Mind you I was buying weekend food for my kids. i then proceed to do a refund request on their "wallet", and when I call the contact centre on the 30th, they inform me that I have to wait up until 10 business days. What I find disturbing is that PnP has rejected me as a customer but yet they are willing to hold my money for 10 business days, which they earn interest on.

Furthermore, the contact centre says they cant do anything, spoke to their consultant and said I will log a complaint on HelloPeter and her response was that I must have a lovely day further - the nerve