Vodafone Live Theft!!!

I recently checked my billing randomly, only to find out Vodacom is increasing my bill with "content services" and "entertainment services". Upon phoning I was told it is for Vodafone Live, which I then cancelled on 24/04/2018. I paid the outrageous bill end of April, thinking the kids might have run it up. This month, upon checking again (sim now lies dormant in the safe) the bill is even higher, now with data also missing. I have phoned Vodacom again today and had that sim stopped. I will not be paying this bill. I have stated the same to the operator when I phoned 11/05/18 to once, again have the Vodafone Live stopped. Vodacom keeps saying they will investigate and no-one actually stops the service. I firmly believe my sim was cloned somehow.