Netstar lying about annual increase on tracking system subscriptions

I signed up with Netstar on a 3 year contract when i fitted a tracking device in my Hyundai i10. During my application over the phone i enquired about the annual increase and i was told that there would be none. To my surprise, i received a letter advising of a subscription increase after the completion of the first year of the 3 year contract. I suspect Netstar is using ************ means to sell their product by lying about their subscription tariffs. I wrote an email to them on the 28 February and am still await for a response.

Brij Boodhram