Century Link Dishonest sales information Seattle Washington

On May 4, 2016 I received service from Century Link. The previous week I signed with a sales representative. I was told about the current promotions and accepted the services and arranged installation. The sales rep did not disclose that I would not be given the promotional discount for the first month of service. My charges averaged about $50.00  more than expected for the first month. Customer Service was called on June 17, 2016 to ask them why my bill was for $224.00\$163.53 was for television service. The customer service rep apologized several times for the sales representative not providing accurate information. I have never filed a complaint against a company but greatly feel I've been misled. I would cancel with Century Link, but was told it would cost me $440.00 to terminate the service.