Unauthorized billing

I have been billed since March for a service I did not subscribe to (Smat Call Technologies) R7/day. I was however being billed between 8 and 10 times a day. I blame the Company for trying to make money from unsuspecting clients, but most of all I blame Vodacom for not having a system in place that can verify if you want these transactions to go through. Banks can do it why not Vodacom. Banks also warn you if they find suspicious transactions going through on your account when clearly there has never been a history of said services in all the years you have been a client. This should be a system that is put in place immediately unless Vodacom is getting their cut from these types of deals?