Poor service!!!!

my Netstar account hasn't been debited since October last year and I've been calling them at least once a month, their consultants will promise to sort it out but they never did. sometimes they'll say they gonna call me back or send a technician, but none of that has been done. I am extremely disappointed with this company and I find it very difficult to be their client since they are not taking my matter serious. I am now tired of calling them without any assistance.