Arrears Account

I have been a member at Virgin Active from 2013 to 2016. I cancelled the membership because I moved. Today when I did an membership application, it did not go through so I made a call to the call center. The lady told me that my account is in arrears for the year of 2014 for 4 months, so I need to settle it before I can join, or I can make an arrangement to pay it off in two payments. She also told me that they have sent e-mails and phoned me. Obviously if they did, I would of known an sort it out. I know for a Fact that I paid my account each month. This is really upsetting. So I guess Planet Fitness it is, because I will not pay a cent for someone else's mistake.