I have recently been contacted by Fernando y Asociados saying they will get me compensation for a timeshare plus other holiday clubs they want £10100 up front on reflection this feels like a scam please advice

I bought a week way back in the early ’90s at Puerta Calma resort in Puerto Rico in Gran Canaria. I paid over £8k and it came with 2 years free fees.
Roughly 6 months after the purchase I realised it would be of no use to me. I contacted the resort repeatedly informing them I did not need the week I purchased and could refund my money or as the management of the resort could they resell it for me. I never got a response to my numerous requests.
Then I started to get invoices for the annual fees. Again I contacted them again I was ignored. In voices kept coming for several years then stopped and I’ve heard nothing since! I honestly believe I was robbed of the £8k?

My husband and I bought one week of timeshare 1999 and another week at the same resort a few years later at Bahia Blanca Gran Caneria. We continued with maintenance payments till his death in 2004 I continued for a while then misguidedly tried ‘Sell my timeshare’ in 2006. They are under investigation by police and I got my £6000 back via sect 75 with Nat West about 2017. I used Preteorian Legal to get out of the annual maintenance contract as they broke off their contract with Bahia Blanca via a Tenerife address who owned the site.
However the initial outlay of £12,000 I am still out of pocket. As I am now 67 years old this money would now be useful to me. I was informed last year the company we bought our first year with at Bahia Blanca sold the business on 2000 and we had no new contract with the new owners for maintenance but we paid it never the less

I have a certificate from Fullbrook Associates stating that my time share contract has been terminated. Another company Fernendo y Asociados now tell me that this is not a legal document and that my timeshare contract is not terminated. Can you please throw any light on this?