3rd failure to resolve matter

This here serves as the 3rd time I've addressed Vodacom about their breach of the contract that they drew up for me. Prior to this complaint I stated that they failed to contact me regarding the problem then Moddy Motebejane sent me an sms promising to look into it & see how best to resolve it. That was the last that Moddy communicated with me. Moddy Motebejane texted me using a number that cannot be called or texted back with, leaving me his/her mercy. After all these months of waiting while paying for an incorrect phone, I expected a phone call from Moddy that regarded infomation about this issue and feedback about when I can expect a way forward. Vodacom has no problem in forcefully taking money from my account every month yet they aren't interested in customer satisfaction. I am a reasonable person. All that I request is an amicable resolution to this problem. I respectfully ask that Vodacom take up this matter and liase with me constantly until I receive the full value of the charge that I am paying.