very poor customere serce

I app**** to mobi ware hous almost four months ago for a data plan with their service provider Mtn,the deal was for R79 for 1gb over 12 months,however they never delvered my data while they habe been deducting my premium,i phone in a thousand times and yet my issue has not been resolved and the<br> Absolitely refise to cancel the contract or refund me,im very dissappointed in mobi warehouse theu are pathetic and dont live up to tjeir promises