Service not cancelled, still debiting

I have taken out a contract at Planet Fitness in 2014 along with an added service called the Black Tag allowing me to take someone along. The gentleman that assisted my application and contract also assured me I could cancel the service any time. This proved to be incorrect and I was stuck in a contract. I have seldom made use of the service so in November the service had expired and I had called in to cancel it. The agent confirmed that it has been cancelled on the system and I will no longer be debited and further. Debits have went off in December, then January and now again today. Calls to their call centre are futile. Their 0861 toll-free number just get rerouted to one of the gyms, not their call centre and I am being pushed from pillar to post. Sadly, I no longer recommend Planet Fitness due to their poor service and unskilled support staff who ill-advise and who assure that all is in order but in actuality this is far from the truth.