UNAUTHORISED DEBIT ORDER & NO CONTRACT

I have no contract no deal with this service provider, on the 30th April 2016 an unauthorised debit order went from account for services which I do not have no use for. This service provider is supposedly a "subdivision of Vodacom" which for me I think it is ****my and and disloyal for Vodacom to be providing such providers with our personal details. I have clearly expressed to the consultatnts of this provider that I have no interest no wish to be their customer as I am already a direct customer of Vodacom. i think this is an inconvenience and true refelction of how low servicce providers can go to rip people off their hard eranings.