Little to no service (signal) in Black Ridge

We have been experiencing little to no signal in the Black Ridge area of Pietermaritzburg for what must be two years . Contacting Mtn is a joke no one even responds to what up to now has been a request to look into the issue of the \missing service\". We have resorted to contacting Mtn on Facebook and initially there was some half assed response but that too has come to an end . Billing is also an issue whilst not owning a Black Berry for a number of years I still get billed for BB messaging ( I will look for redress through the small claims court for this) Mtn is fully aware that I no longer use a Black Berry and that I have not for a number of years .( Im not the only one who is billed for this service ) Mtn has made NO effort to address either issue and will probably never do so . Mtn dont under estimate the power of Social Media it had brought better service providers than you to its knees "