Pathetic service from Cell C

Pathetic service from Cell C. I had a month to month contract with Cell C and they decided to change it to a 24 month contract by sending a so called sms of updated t&c in November. My month to month contract was taken in December where the agent never advised that its a 24mt contract and they stated its a month to month. Secondly they offered the month to month contract after sending their so called sms. When i requested to cancel there is no assistance and im requested to pay the balance of a 24month contract. The big question is WHEN YOU DECIDED TO SEND THE SO CALLED SMS OF UPDATED TERMS AND CONDITIONS WHY DID YOU NOT STOP ADVERTISING THE MONTH TO MONTH CONTRACT. Why did you continue advertising it to trap your customers into this ridiculous contract. Then you got so called anytime minutes on this contract number which cannot be used to phone a 0860 numbers as they are called special numbers so now on top of paying for a contract which was forced on you, you still must buy airtime to phone this so called special numbers. WHAT A ****???