Bad attitude

I called beginning of December to request cancellation, the lady i spoke to clearly stated that my last debit order will be on the 25th December. They did so and now I received an invoice stating i need to pay. When i called their call centre they transfered me to 3 different departments and the last person i spoke to was very rude, Marcia from the the accounts department even dropped the call after promising she was gna transfer me to cancellations for a call retrieval.. It is with pure disgust that customers are given incorrect qoutes and they are given bad attitude when they complain. I have been a loyal customer but now im treated with disgust. I have never been so disappointed and disgusted with the service I received today. I cant wait to get out of the other contract