Worst customer service in the world!

3 months ago in June, I received an sms telling me my account is in arreas. I queried the reasons for this with Vodacom as I have always paid my accounnbt timeously, to date no one has been able to give me a proper explanation for the amounts that were charged to my account or the why! Today (September 4th) my account was locked, after months of trying to get a response from Vodacom today I get told another story from all the stories that id been getting told all along, saying that I have been charged for 2 handset installations, someone else says its due to insurance . Which is it?! No one can answer why but Vodacom is real quick to lock my account with no due explanation or warning, in spite of me having tried to resolve this issue with them. Vodacom is both inefficient, unreliable and ********* in my opinion for charging unexplainable amounts, not responding to customer queries then holding the customer hostage for their incompetence by locking their account! I've had to use up hours of my time holding and being sent from pillar to post about something no one seems to know about but I'm expected to pay up!?