FOSCHINI PLEASE PAY MY MONEY BACK

Can somebody please intervene I have been treated horrible by Foschini , Mall of the South. I bought a cellphone (Nokia 5) from their shop. With in a month the cellphone went blank, the guy called KABELO told me I was suppose to update the software ,which was new to my ears because it was not my first time buying a new cellphone but I never update the software. They took my phone for repairs on the 11/11/2019 and said it will take 14days. 14 days passed and they were quite, I went to the shop month end Nov ,Kabelo told me my phone cant be repaired they I waiting for the repair center to authorise the documents so that I can be refunded. Month end Dec I went to the shop still no luck, I called the number that was on my slip and went straight by myself seeking for help to MTN, the Mtn repair center guy was friendly, understood my situation and took my documents. Kushal delayed to process the request and I only get my credit number today. When I go back to Foschini the Kabelo guy was so rude telling me to handle myself as I did by going to MTN. I told the guy what I want is only to be refunded my money. He said he cant I must go back to MTN and ask them to send him email. I felt like clapping the stupid guy because his treatment was uncalled for and didn't respect me as a customer. Please help I want Foschini Mall of the South to refund my money back as instructed to do so by MTN ,300 KENT STREET ,RANDBURG.