NO CUSTOMER SERVICE

I moved to Germiston about 8+ years back. I cancelled my membership in Krugersdorp by fax. Once I was ready I joined Germiston Virgin Active. Yesterday I wanted to get a membership for my mother. Now my account is blocked because I allegedly owe money from 12 years back. I tried to explain to the consultant on the phone, that I cancelled my previous contract, and I do not owe them. Now I must pay half. I refuse to pay for something I dont owe. My current contract is deducted by debit order. So why wait till now, when I actually gain someone to join, my account is blocked. Obviously I do not have the proof from 12 years back, so now what do I do? Cancel my current membership as well, and join Planet Fitness? Maybe they will take better care of their members. I have been a member of Virgin Active for many years, but clearly that doesnt mean anything to them.