One star per consumer portal makes 5 stars eventually - Keep practising!

A week or so ago I wanted to buy a newer laptop since mine operates on Win 8.1. I went to the pawnshop in Oakdale, and asked the owner if there's any exchange possible if the laptop does not work with MS Teams. He told me to do my research on the specs since all their laptops are tested and it works. A week later I bought one after asking a friend to pay for it on his credit card. The price was R5000 and I looked at the specs in the store. It looked like it could do the job. And it did during the testing and personalisation. But, three days later, 14 hours before I need to use it for business, the screen went black. I went back to store, in the hope they will help me out with a loan unit or a replacement since there wasn't enough time to have it fixed. I was told it is not going to happen. I then asked for a refund. The owner was consulted and I was told I can sell it back to them (And get 50% back) and buy a different one. With that, I decided to give them a star on Google for their excellent service. All of a sudden I was asked to provide details of my complaint so the matter can be escalated to the so called "Management team" of one (the owner). All they wanted was to take the complaint out of public view. But that's not how things gets done anymore. I only need to ask for help once. Not twice. Whatever you do, do NOT buy used electronics like laptops from Cash Converters (Or as I now call them; Trash Converters) How many times do the same laptop gets "sold" before this stops?