Vodacom *****ulantly upgrades without consent

I received a call from Vodacom at 3:30pm, trying to push me to upgrade my 2 numbers. I explicitly said I didn't and if they wanted to they could email me their proposals. At 7:35pm I received an SMS alerting me to contract cover being added. When I called to query, it appears they upgraded both my numbers as well - both bigger prices. Also I intend to discontinue the data contract and have just being paying it til the end.

Now they have upgraded me, despite me EXPLICITY saying NO and I was busy. this is *****!

The person at the customer care was amazingly helpful, but I will have to call back again tomorrow. Clearly one bad egg in the Vodacom department. this is shocking that this is allowed and not ****ed out.