Poor signal and no Vodacom response

We have an issue whereby the vodacom signal will disconnect for hours at a time or whole days and there is then limited spots in the house to pick up any form of signal. On contacting vodacom they simply run through their list of checklist answers (your phone, load shedding, wait, etc.) which are all not acceptable as they don't listen to the issue at hand and this has yet to resolve any of the issues. It has been reported more than once.