Cancellation of contract

I took out a 6 months airtime contract that would be charged on my edgars account. The contract started in June 2014 and was supposed to end in December 2014.<br> <br> On the 5th March I realised I was still being charged for the contract and it hasn't terminated so I sent an email to accounts and they responded that my query has been forwarded to the relevant department. I did not receive any airtime in April so I assumed it was cancelled.<br> <br> To my surprise on the 15th April I received my statement and it was still reflecting the contract amount been charged and immediately I sent another email to Accounts and they responded on the 18th April telling me that it was forwarded to the relevant department and assured me the cancellation will be updated on my account within 48 hours.<br> <br> I received my May statement and it still reflects the amount and yet I did not receive any airtime. I sent another email and they told me the the cancellation was done on the 12th May 2015 yet the request was done two months back.<br> <br> I was charged for April and May but no airtime so am I paying for goods that I am not receiving and why was the contract not automatically cancelled.<br> <br> <br>