cell c not providing me with service at home

I have been with cell c for more than 11 years had no complaints of the service until recently when I moved out of Mitchell's plain to welcome estate opposite vanguard mall in cape town I experienced signal problems due to no signal in the area I lodged a complaint recieved ref numbers and was contacted by tech support and was simply told I must get a signal booster and was sent a massage of where to purchase a signal booster with amounts between 3 and 8 thousand rands . I have 5 contracts with cell c and never skipped a payment on one of that contracts . now I'm paying for a service that cant supply a service to me at home I must now spend 3 to 8 thousand rands so cell c can supply their services in comfort of my own house . I was also told that cell c is busy with plans for erecting signal tower in my area but cant tell me when this will happen. my neighbors that is staying in the area for years who was also with cell c have changed to vodacom as they had the same problem and was also told of this signal tower being erected in welcome estate area and that was 6 years ago what do I do now