retro fitness they charge me ,after sign termination paper manahawkin, New Jersey

to whom may concern
i join the gym in toms river nj 3 years go
after 1 year i decide not to go anymore they told me to sign a paper and i would not get charge anymore because my contract was over
that was 10/10/2010
manahawkin retro fitness bein chargin me all this time and i did not know they where doin
i call to speak to the manager 5 days ago and he still has call me after he rip me off for 2 years
i call again and ask to give me the corporate number and they told me the manager was goin to call me im still waiting for his call  can you help me  let me know what can i do to get my money back