I bought a fitbit sm...

I bought a fitbit smart watch in 2019 from dis her for 3k...late 2020 it stopped working the screen just went black. I tried getting it fixed with no luck. 1. No one can fix it nor diagnose 2. Fit bit has no branch where I can take it. 3. I tried reaching out to them. Since this was during Covid I thought that when businesses open I will get a better response. But late last year December till now. Iam not getting any joy on insta - no response on face book they kept telling me to switch it onandoff but how do I switch it on when the screen is blank/black. They have no branches nor service outlets yet im stuck with with a 3k watch that only worked less than 2 yrs.