Cancelling my agreement

I joined planet fitness gym but I had to relecate due to work so on day 5 as I was told within 5 days I can cancel if I wish too. Called the call centre on day 5 was told they offline,day 6 went to the branch n I was told again they where offline at the branch as well as they confirm I'll be called. Day 7 called again the call centre still I was told the system are still offline n I ask if is the a way they can do it manually as it was day 7 the consultant told me I'll have to pay the remaining amount for the gym contract, I therefore ask y as I called n came to the branch within the given time. They told me my contract cannot be cancelled as its already after 5 days of which I called them, she told me there's no proof I ask how can I have any proof as 1 I used a public phone as they r calls r expensive n they where offline to give me any reference. Now they taking me to ITC n none of the people I spoke to called me back like they promise. I need answers as planet fitness is a ******* with their pathetic system that gets offline when u need to cancel.