Worst experience ever

I had the worst experience ever. I purchase at Makro using Onecart and I received an incorrect flavour to which I called customer care immediately to make them aware as get a resolution. I was advised to wait a bit as there are currently no drivers available. I waited for hours and I called multiple times. I had to go personally to Makro store to return the incorrect flavour so that I can get the correct one.which defeats the whole purpose of online shopping. I needed the item immediately, so when I got there, I was advised that the flavour was not available in the size that I ordered, they can either refund me(which would take 2 business days) or I can get a credit note, I had to agree to a credit note because I was desperate for the items, which was missing 8 rands, so that I can purchase in store. I spent an entire 2 hours there, sorting this issue and and waiting in line so that I can get my order correct. I asked the customer care lady if I can get my delivery refund since I'm returning the item myself, she said that can be arranged. It has been over 24 hours and I have not received any communication regarding this. I need my refund as I had to personally shop for the items when I ordered online services. Order number:***