Very Poor Service, Staff don't know how to do their jobs.

No one seems to be able to assist me with my billing query. I have called Vodacom hundred times this month with no feedback after I had received my statement and noticed I was billed incorrectly after settling one of my contracts. Today I called again and as usual I was not assisted at all, was transferred to 6 different people in different departments and no one seems to know what there doing and after 30mins of explaining my query to 4 different people and being transferred to different departments, only to be hanged up at the end. I'm really ****ed off and fed up now, I've tried to be patient but seems like no one really knows how to do their job at Vodacom. I have been a loyal custom to Vodacom and it saddens me to see how one simply query can be so difficult to resolve. It's almost month end now and still my query has not been resolved. Now I'm thinking of cancelling all my remaining services with Vodacom because this is really ridiculous and I'm tried of calling every single day and being referred to all departments.