Virgin Active refusing to cancel membership

I have now been trying to cancel my membership since February. I was willing to pay the cancellation fee then they said no..they will reduce my payment and come June/July I can cancel without any cancellation fee. I tried again to cancel April/June and they said they will get back to me!!! It's now July and they have deducted the full membership price!!! without getting back to me...and avoiding me... What do I have to doe to get my monies back and get Virgin Active to respond!! I have not even visited the gym the last couple of months!!