Contract cancelation

Wish I could give a negative 10 star rating. I requested cancelation of a contract on the 13th of February. I received an SMS to say that my cancelation is not done until I receive an SMS. I never received that second SMS. Life got in the way and I only realized now that the contract was never cancelled. I called Vodacom, just to hear that I have to still pay two installments after the contract is cancelled. I again received an SMS to say that I will receive an SMS when the contract is canceled. I know that Vodacom has always given bad service, but to penalize me because someone didn't do their work is taking bad service to a new level.