Forced to pay in advance for Data I DON'T WANT

Afrihost is refusing to cancel a data plan I haven't used or received data for since end of June. I've been a n Afrihost client since 2013 and have recommend them to many people, but as of today my opinion has taken a 360 turn. Afrihost is billing me for data I don't want and have not received yet. I'm on a month to month plan since my contract ended years ago. I called the accounts and the uncouth female refused to hear what I needed to say and then put me on hold for over 10 mins I eventually dropped the call. It is my consumer right to choose the product or services I want and I choose not to have your data. I don't see why you need to bill me in advance for something I DON'T want. My Account number is A ********** 7.