Extremely dissatisfied customer!!!!

I placed a PnP order online 6 days before the delivery date. My time slot (for which I paid for) was between 12h00 to 15h00. I selected my business address for delivery, but was off work at the time and had to make a special trip to the office to receive the goods. When we got to 15h00, I phoned the toll free line to ask where my order is. I was told that the driver is minutes away (30 minutes) and if I could please wait. When I phoned the toll free number again, I was told to wait, as delivery can only take place after 5....and here I sat, woman alone, in a business park waiting for my groceries that was already paid for yesterday. When I asked if they cant deliver the goods for me at home, I was told that they can't amend the order, but yet they can change my delivery slot. I did online shopping because it's supposed to be more convenient. I just want to say that it has been an aweful experience. I buy All my groceries at PnP, and has done so for the past 20 years. I'm afraid that will now change. Hopefully Checkers will appreciate my business more. Well done PnP!! Your staff managed to get rid of a good customer.