Account was replaced?

----- - Jan 25, 2021 at 03:40 AM
Hi there! I was recently told I needed to sign up for Facebook in order to use my messenger. Originally I refused as I was in a hurry and needed to send a message but then realised I was unable to. My messages stopped sending and I stopped recieveng any so I logged in from my laptop on and accepted when it asked me to create a facebook account. Assuming it would be linked to my number I used the same name and number. When I went back into messenger all my messages were gone, it appears my old account was replaced with this new one, whereas I thought this would simply add a facebook account in my name while allowing me to continue with my previous messages. I have lost everything and many valuable contacts, I would be so grateful if you could help solve my issue.
Many thanks :))