Billed for a service I cancelled

In 2012 I agreed on internet advertising with adword. The consultant assured me that the service is month to month and can be cancelled at anytime. I did not get any business so I cancelled this service within a few months.<br> <br> According to Trudon I now have an outstanding balance of R90 000.00 ..... what a shock. According to Trudon I never cancelled this and the account just continued to bill. Nobody contacted me from 2012 - 2015 to inquiry why this account is not paid and I did not receive a single statement or call from the yellow pages.<br> <br>