Unable to cancel.

Cannot cancel account until 6 months has passed and full payment has been made! The sales representative clearly stated to me its not a lock-in contract and if I wished to cancel I will pay a cancelation fee which I was fine with. Spoke to a representative a few days ago who told me I would need to pay full 6 months before canceling! Next day I spoke to a manager called Liam who promised to listen to the sales call and would call me back but did not! Next day spoke to a representative who told me Liam has asked the retention team to call me that same day and I still waiting for a call a week later! Disgusted.