***** on my account, worst service in world

I phoned vodacom about going over to pre-paid , the operator I spoke 2 not only F*** up my account and lock me in a new contracted the also loaded a additional number and are loading airtime on the number .... I have phoned then 20 times in November and 15 times this month and getting no help with anyone. They promise to phone me back but and close all the ref number calls with not fixing the ***** that they are committing on my name and steeling my money