Horrible service

I logged a call with MTN coverage to install a booster and antenna on the 11 February 2016, i was told i would be contacted in the next week to advise when a technician will be installing the booster and antenna, nobody has phoned me yet, i phone in yesterday and requested that a manger phone me and apparently my query was escalated, i still have no received a call from anybody what so ever, i call a few minutes ago and spoke to Rubin who told me that all the managers have left already, hows that possible there should be a supervisor or someone i can speak to, but no Rakesh the manager and David the supervisor are gone home already, if this is not resolved soon i will be cancelling all 7 of my contacts with MTN.