Terrible service Pick n Pay ASAP

On Sat 26 Nov at 10:58 I placed an order on Pick n Pay ASAP app. Just a few items. I received the order # *** @ 15:30 4 and 1/2 hours later only to discover that the products in the bag are not what I ordered. I spoke to the driver who said there is nothing I can do I must call Customer support. I called... 20 minutes later no one picked up and I left a voice message. I called the store Montana Park and explained what happened. They didn't help either and said I must call Customer Support. I tried calling again to no avail. I have sent follow up emails as well and as at 20:00 I still have somebody else's order (who is probably just as upset as I am) and I am still waiting to hear from Customer Support. This is terrible service and I am requesting a full refund.