Horrible experience with Pick n Pay ASAP

Hi have had the worst experience with Pick n Pay ASAP. I placed an order at 14:30pm, money was deducted as per normal and here I was waiting for my to be delivered between 16:00 - 17:00 as per the app. After checking closer to the time, the time had all of a sudden moved to 17:00 - 18:00 so I called the call centre as this was later than anticipated and wanted to know why it was moved. Agent assured that they will send an email to the store requesting that the order be done as per original time given. I again went into my ASAP app to double check and all of a sudden my order was cancelled, money was put into my "app wallet" as a credit. When I called to find out what's happening, I could not get a straight answer, just that the "store didn't receive the money". I received 2 different reference for the original called made that I gave to the agent on my second call, her name was Inge, but she was unable to find it anywhere on the system. I asked how this was possible as I received both an SMS and an email and she just said the previous agent ****. So my issue is, we are given an app in order to do online purchases for delivery when we are unable to make the trip. I am relying on the delivery for whatever reason and the store can just cancel the order on their side without informing me and when following up with the call centre, the call centre agent **** and the reference numbers provided is not valid. So what is the point of shopping on your app if you and the store can just change and cancel however you see fit and then give us a the recourse of a support number but no support is actually provided. Such bad service today