Contract renewed/Expiry date changed

My account was in arrears and i was contacted by vodacom to pay the amount that i was in arrears with and continue with my contract,but after paying all the arrears i called Vodacom and they told me that my number was deleted and now i have to use the new number that they have provided. Then i called them again and they told me that my contract will expire 2016/7 and I've been to understand how come? I've been sent from Pillar to post and i even went to the vodacom shop in benoni but the consultant told me there's nothing she can do only the call centre can assist me. So for all i know my contract was supposed to expire these year but now its more or less like I've taken a new contract ,cause the call centre consultant i was speaking to said the contract was open 2014 but l don't understand how is these possible cause the number i was using is ***and it was taken 2013. The new number that Vodacom gave me is ***.