Vodacom exploits 80 year old man

I don't know where to begin. My 80+ year old father has just found out that he has been paying a bill for an internet ****le for the past 10 years. He has unknowingly paid thousands (FROM HIS RETIREMENT FUND!!!) to Vodacom for a service they should have cancelled years ago. As far as I know you cannot continue charging for contracts for this long without further notice given. He has tried resolving the issue - only to be charged a further R2000 for reasons he cannot explain to me. There seems to be no qualified or even vaguely knowledgeable person working for Vodacom that can comprehensively explain what the problem is. If you are interested in this service provider I STRONGLY ADVISE YOU TO KEEP LOOKING ELSEWHERE, as this company clearly have no problem exploiting old people and *****ing money from their pensions. All the while we have to put up with invasive promotional calls everyday - which is harassment plain and simple - trying to hook us onto more of their shoddy 'promotions'. Shame on you Vodacom.