Continues billing me after notifying me of contract termination.

After notifying me that my contract would come to an end when I turn 25, Planet Fitness continues to bill me for two months. Im absolutely livid. This is ridiculous! I was notified that the contract would end, and thus made alternate arrangements, I dont have the cash to keep paying for a service I was notified would be terminated. Ive visited the gym and spoken to those representatives working there as well as spoken to the help line multiple times, every time I go everyone assures me the system has been updated and I wont be billed anymore and that the only reason I was billed was because the previous person didn't update the system or that the system didn't pick up that I had turned 25. Im extremely angry at this point that it has still not been sorted out. How many times do I have to sit on the helpline or go to the gym before this gets sorted. How can PF notify me of cancelation and then continue to take payment?! I will most definitely never join another planet fitness and will not recommend it to anyone considering joining.