Business ProfileforYellow Pages

I worked with a sales agent to purchase 4 months of advertising for $350 per month. I had a fixed amount of $1400 to spend as I had received a grant from the government and would otherwise not be able to afford advertising. We agreed on a 4 month term. The marketing agreement that I was sent indicated a service date of 4 months. There was no "initial term" or "variable term" or "renewable term" on the agreement. There was only service start and end dates. I also emailed the sales agent and clearly stated that the service was to end in March. I was then charged another $1400 after the service end date. Upon contacting the company they replied that I needed to cancel my agreement 45 days prior to it ending, despite there being no indication on the contract that it was renewable. Also, I did not provide a pre-authorization agreement for any money to be debited from my credit card after the end date of service. I called to resolve to which they replied my email stating "$350 for 4 months - ending in March" was not acceptable. Their contract to me had zero mention of "renewable" or "renewing".