Useless fibre suppliers

I had a problem with my internet connection about 2 months ago. Fibre supp**** from vumatel. The issue was eventually resolved and I requested a refund as I was off for 2 weeks. I'm still waiting for a refund. My internet has now once again been off since the 17th. I logged a complaint on tbe 20th which was 48 hours ago and still no interest. Instead they send me a sms saying my problem has been resolved. When I question them their turnaround time jumps from 24 hours to 72 hours.