DSTV Internet

I have bought the DSTV router in November and paid the required premium, but the router has not worked. i have called their call Centre endless times for assistance but have been sent from pillar to post using my own airtime to call them. i was told that an agent will call me to arrange for the router to be exchanged but to this day i am still waiting. The data has not worked at all and now the month is almost over.