Contract Ended, Still have to pay???

Good day<br> <br> I phoned Vodacom contract cancellation department on the 5 May 2015 to cancel my contract which ends on the 6th May 2015. Im cancelling due to having a Company cell phone and no longer requiring the contract or Upgrade. Upon trying to cancel, I have been told that I will still be charged for the month of May as i have already been issued Airtime and Data.<br> <br> ANSWER this for me, My contract ends on the 6th of May, why was i even given Airtime and Data if this is the case? Why did i receive no calls or queries with regards to not upgrading or if im ending my contract? I made no agreement that i was going to continue this contract hence i shouldn't have been issued airtime or data. Why am i being charged the full contract value if i am no longer paying for a device? WHY, WHY, WHY???<br> <br> I feel i am being ****** from Vodacom and refuse to pay the contractual amount. My contract states that it ends on the 6th May 2015. I have done my part by fulfilling the contractual agreements. and now its at a END. FINISHED. <br>