**** service and over billing

I just changed ISP from Mkonnect to Webafrica. Fibre was installed in 2018 all they had to do is activate the line. I contacted them on the 19th of August 2020 and I was only connected on the 23d of October 2020. I was told that this process with only take 48 hours to happen. I was making phone calls to webafrica every 3 days to find out what is happening. Now my bill arrived via email and I was charged R1300 for fibre installation that never happened. Contacted billing department and was on hold for 1h30min. The note was attached to my account and that the amount will be credited to my account. Novembers-December bill arrived and nothing was credited. Spent 2 hours on hold for billing and still nothing has been done. I am so irritated by nothing being done and they are using the covid excuse to overbill their clients.