Very bad customer service

#Win On the 5th August I bought a ups and a dishwasher ect at Makro Cape Gate all brand new products. Took it back on the 13th and got told that they can't refund my money although the ups blew my motherboard on my pc. They will have to send it for a service. The week before last they phoned and said there is nothing wrong with the ups and it will get send back and u can puck it up. I phoned Mpho that is handling thus case to hear his off and that his working from home but they will tell him to call me immediately as it's urgent. Needless to say it's I've a week later and he never phoned back. Also makro is dead quite as I told them that I want my money back and that they got no right to deny me this. No one on the floor explained any form if grantees so makro don't have a right to deny me my refund. I also asked them if they willing to pay for my damaged motherboard but no response. I DO NOT WANT SOMETHING THAT DAMAGE MY PROPERTY. Mark's service is very bad to say the least.