MTN exploiting customers

I received this message today: "Y'ello. We sent a request to the account holder to authorise your request to subscribe to SA Dealz at R3.00/day" I have not subscribed to anything! How low can you go MTN!!!! I can not trust any business that use such tricks to exploit people! Shame on you! To unsubscribe: To block premium rated services, do the following: Dial USSD code *136*5# Content Services Manage Premium Rated Services PRS Charging Block PRS