Avoiding cancellations. Telkom

So a week and a half ago. A guys from Telkom phones me offering a data plan with a new sim card because they noticed how much I have been spending on data. R199 a month for 20 Gigs day and 20 Gigs nigh and I'm like ok that is worth it. The guy was very nice on the phone and he even told me my phone takes 2 sim cards which I did not know about. I received the package today and as I am about to add the 2nd sim card. I found out my phone does not even take 2 sim cards.i called them to cancel the contract as I was basically **** to.I've been transferred to different departments for the last 3 hours. People from sales advising me I need to speak to billing and vice versa. I just want to cancel the sim card cos I will not be able to use it. It seems like they just trying to avoid the cancellation. Very disappointed in this and by the look of things I'm going to be stuck having this card and having to pay all the fees that go along with it. Great. Just great.

They have definitely lost me for life as a customer.