Debited - Conrtact Cancelled

Cancelled my contract on the 29th - They told me I cant cancel my husbands account as he is paying for the contract. Which is totally incorrect, the debit order comes off my account. On the 7th I called to confirm if it was cancelled and I was informed that my husbands wasn't and he needed to call in. I advised that my husband works in a call centre and will not be able to call. The call centre agent agreed to call my husband.. Which he did and they proceeded to cancel the contract. That would mean the contract would be cancelled by the 28th - giving 20 days notice. Today 1st of April my account gets debited. I call to confirm what the problem is an I am received by an extremely rude CC agent - Siya. Asked to speak to her manager - Waited 19 mins until a Wendy answered. She was going to call me back in an hours time. It is now 6 hours later and I have still not heard from her. This is totally unacceptable. I want my money returned into my account!!