Virgin Active - ******* /unauthorised debits

I am beyond frustrated with Virgin Active who are harassing me for a contract taken out in 2003 and terminated in 2004. The first time I was made aware that I allegedly owed them money was when an unauthorised debit was made from my bank account in October 2020! I have spoken to three of their employees who assured me each time that it would be escalated/investigated. The last such call I received was today - 19 January 2021 . Again I was assured that they would rectify their records and thereafter the unprofessional agent simply terminated the call. Not only are your systems completely useless but you also employ downright rude employees. The first agent was quite happy to inform me that I would be handed over. So to Virgin Active: have you heard of the Prescription Act? What happened to the debit orders/ amounts you claim I owe between the period 2004 and October 2020? Thirdly where is the proof that the contract terminated was continued on a month to month basis as you claim - why did you not debit my account in 16 years? Lastly - please send your employees on a course as to how to deal with the public. Just because you are in financial difficulties does not mean you can start unearthing obsolete/terminated contracts to fill up your coffers!!! In addition how on earth were you able to activate a debit order that was no longer valid or enforceable??? Oh - fyi - they dont have a complaints channel.