Vodacom Does not pay money Back!

Prematurely Cancelled my Vodacom Contract in June this year. I paid the addisional penalty fees aswell. July&Aug they do not charge me, but then Sept a DebtOrder goes off again and I phone, they say looks like Contract was never Cancelled on their system, Lady cancels it and then says they will call to organise reimbur*****t. They HAVE NOT CALLED ME OR PAID MONEY BACK and Octobers Debt Order as also gone off and its a bigger amount?! I have proof of everything but can't get hold of anyone, NO AFTER SALE SERVICE, and cannot do it in shop??