Vodacom at fault. Pathetic service

We have a Fibre contract with Vodacom and have had it for almost 2 years. On Sunday (22 September 2019) our service was offline the whole day. We contacted vodacom and they advised us that they were doing upgrades but the service has been restored and to restart the device. We restarted but our password was not working and we had to call them back again. The 2nd consultant we spoke to said that they have mixed up our serial number on our modem with a new customers as the new customer has a similar serial number to ours and that a technician will be coming the following day to rectify it but no one showed up or contacted us. We than had to call vodacom again at our expense to get an update and we were told that the query was not assigned to a technician yet and that the consultant will assign it to someone and get back to us but no one did. We have had to call again today because no one has given us an update. It has been almost 3 days without our internet and vodacom is dragging their feet with a problem that was not our fault in the first place. We have had to spend additional money on data and airtime to call them and still no luck.