Appalling service from pnpAsap!

I have never before had such appalling service from a company. I ordered groceries through the asap! app for the 1st time on Sunday. They changed their delivery time 3 times, thus I had to cancel my plans for the afternoon. Eventually I received a notification from the app saying that the delivery failed because no one was home! 3 min later they arrived with my goods. The 2 litre soft drink had been opened and was only 3/4 full. 4 of the items were not in the bags and the store was already closed. I emailed asap support and after numerous emails during the week and one call with an agent, they assured me that I would be refunded for the 4 missing items and the used soft drink. Each email gave me a different amount to be refunded but eventually they got it right. This morning the money was refunded, but only for the 4 missing items and not for the soft drink. I am totally appalled at the service I have received from Asap! As a 1st time user I was given a R50 off promo code which when I punched it in, had expired! They told me they can't refund me for that but can give me a new code that won't expire. As if I would ever use their service again! I feel like I am being punished. This is so frustrating!!!! One would think that they could offer some form of compensation for the stress that they have put me through this week. But they couldn't even get the refund right.