Unauthorised activation of subscription service

I noticed on my last two monthly statements that I am being charged for a Vodafone Live subscription service. I have NEVER activated a subscription service. After further investigations I discovered that the service called "p-squarem-hooked-c-01" was activated on 24 February at 5:40 AM. This is impossible because I am never awake at this time. This service costs R10/day and the amounts accrued for my February and March bills are over R350. I phoned Vodacom customer services and they were EXTREMELY unhelpful and did not resolve this matter. I demand a full refund and I have cancelled this unauthorised service on my account. This is BLATANT ***** and after being a loyal Vodacom customer for many years I am considering changing providers when my current contract is done.