Bad inefficient service from Vumatel

What should have been a 24 - to 48 hour installation has turned into a 6 day installation that is still logged in the system and no-one can tell me when this will be installed properly. The technician that did the installation failed to give the correct information the to head-office and this has caused the delay. This was only discovered on day 5. Nothing has been done to rectify this. This has cost me a fortune in data, airtime and working hours to still not have any further resolution. Supervisors fail to get back to me when they promise that they will. Anything short of going to another provider I'm unsure that else to do. If this is not resolved by the end of today I will be going on all other social media as well as pull out the current installation and dump it outside. This service is totally unacceptable.