Unresolved queries (Query ***) and inaccessible customer service

Vodacom has been charging me fictitious travel bundles which and refuse to deal with queries. Customer service is completely inaccessible and no matter what time of day you call they ask you to call again because they are busy, they don't respond to email queries. If by some miracle you do get allocated a query number, they will just close the case without actually assisting you. I guess I'd better just take my business elsewhere because for over 3 months I've been asking them to correct my billing or at least engage me on these unsubstantiated charges.