Planet fitness just have bad customer service

I joined PF June 2015, on a 2 year contract. Due to transport issues, I could not go to gym for the last 10months but I still paid them on time every month. So I called them 7 August 2017 to cancel since my two years is up. I been promised to get a call in 3 days to confirm my cancellation. But nothing, so I called them again last week and been promised to get a call back the same day. Guess their day is extremely long, since I'm still waiting. I know of some people that have just stopped paying them before the contract was up. Is this what they do to paying customers?? Are they trying to "suck" every last cent that they can out of me? So when I stop the debit at the bank, does it mean "breach of contract"?Since my cancellation has not been finalized?? It is pathetic how they can promise to call you when you need to cancel. But they know what your number is if you don't pay!