No signal comaint and incorrect logging by call ce

Since moving into our new home which is 3km direct line from vodacom head office I get no signal or coverage on our property/ house. Despite logging two queries with the call centre I have still received no feedback or help from their technical department. Each time I phone the call centre (after waiting 20 minutes on average) I either get told that the initial person opened the complaint wrong (twice) or that they cant get hold of me (really??) even though I have also supp**** my email address and my husband's number. What do I need to do to get service from vodacom. The last call centre agent put the phone down on me - or maybe to be fair it could have been a dropped call due to the poor signal/ coverage. When I try escalate this problem to a manager I get told that all the team leaders are in a meeting!