Cancelling my account

I have been contacting and following up with IPS health and wellness for about 4 weeks to cancel my account and everytime I try get hold of them they say they will phone me back. Everytime they phone me back they drop the price instead of listening to my request to cancel my account with them. THEY DO NOT TAKE NO FOR AN ANSWER. If nothing gets done within this week I will take legal advice and I will take time and effort to advertise how bad their customer service is.