Never cancelled the contract

my last visit to a Virgin Active gym was December 2011, of which I there after cancelled my contract with them in January 2012. Granted I owed them a month or so subscriptions for the 2011 year ,I proceeded to make an arrangement to settle which we sorted in 2012 by debit order and closed. In January 2015 I contacted them as I would like to open a national member ship to be told that I owe them for 2012 as per the document they sent me said this membership was only cancelled on the 22 March 2012, now they are saying something else that is conflicting on a different statement. I am still without a gym and my situation is not resolved. No one has called me to \debt collect"the money if I was \""truly\"" owing for the supposed 2012 year and would like this resolved!"""