Bad service

I tried to cancel my car contract the past 2 months with them and to no success until yesterday when the other consultant called yesterday about my outstanding account where i told her that i cancelled my contract and no one ever called me back. So this morning i received a call about them having to cancel my contract and have to serve a 20days notice after ive told them that i cant afford it and they still deducted money from my account. I aggred to a 2yr contract with them and ive been with them for more than 5years and was very loyal now that i want to cancel im been given the run arounds bad bad service. Whats the use of having an option to cancel the contract via the website only to be told that there is no proof of it.