Worse shopping experience, Sandra is kind of lost

I bought an item from GeeWiz tried to return it the following day cause it didn't fit my need, tested it for only 5 min. They tried to make me pay R190 courier fee, I managed to send it to them for R50 . Now they don't want to refund me. Worse shop ever, don't buy from them, you will regret it. I'm going to sue them if I have to until I get my money back.