BAD service from TELKOM

Good day.

I have now been struggling with my telkom dlink router since November 2019. I have phone the telkom help line numerous times and also went to the store 4 times. I either have no wifi or everything seems fine then it says no internet. The telkom consultant in store told me (23 February) my router is broken But to be able to log it in for repairs I need a proof of collection. We both emailed the telkom center and I have still not received anything. If been paying for 4 months now for wifi I can't even use.

Please help