Poor Customer Service

I visited Mr Price Home Kenilworth Centre earlier this year and purchased a microwave. After a few months, the microwave stopped working entirely. Unfortunately, I couldn't find the receipt, which made me hesitant to return it. I contacted Mr Price customer care to explain the situation and was advised to return to the store. The next day, I went back to the store where I purchased it and explained everything to the salesperson. She said she needed to speak with her manager which was not present, they had to phone him/her. This was disappointing because the staff seemed unprepared to handle the situation and refused to process the return. I contacted customer service again while at the store, and was told I needed a document number to proceed. Despite the proof of purchase details on their system, they still refused to assist me. This experience reflects poorly on their customer service, especially since all purchase information is readily available in their computer records on account.