Planet fitness, DONT SIGN WITH THEM, REGRET!!!

I have not had a contract with Plat fitness for more than a year, the debit orders however don't stop going off, I was asked to send a mail to them to cancel my membership which I have done more than 3 months ago, last month I was told my account will no longer be debited (as I paid again at the end of Feb) now the debit order went off this morning.......This is a clear sign of *****/ thievery. I want my money back!!!!!