Angry customer for very poor service

My dstv had problems on the 04th it was Wednesday so I took it dstv multichoice at Mams mall they checked it & told me to take it 2 dstv urgency at gezina. I went there the following day on the 05th. They tested it & said their system is down it is going to take 24 hours 2 check if I was still under warranty or what 4 them 2 exchange it. might do i had a slip with me that said it was bought on April 2019? Or I have to a pay 2 get a new one. They took my contact said they will call me within or after 24hrs.2day it is the 10th still waiting 4 their call&they have debted their monthly installment but they can't help me with their product