Extension for what on price lock

I have a contract with you for 24 months.. But now it says 16months. Can you rectify this? I don't have any agreement for an extension.. I have spoken to Atleast 5 of your agents without any help and mostly dropped calls. Even today Theresa could not give me an answer as to when the 16months was activated and she dropped the call also.. I don't want an extension for the price lock.. Can January be my last month with the contract?