Computer Help and Support

That you either have a key logger on your device or someone has accessed your browser data and scraped your passwords. Then the scammers have changed all your log in details.

Were all the passwords stored in your browser or in a seperate place on your machine, ie password program, spreadsheet etc? I ask because it would help to ascertain the extent of the damage.

As unc70 wisely said, notify bank, anyone you pay online etc. This sounds like the real deal and I'm so sorry this has happened to you.

On Edit: I suggest a full malware scan with the best program you can access. Malwarebytes is good. I know it's too late to undo the damage but it would be really interesting if you can identify a culprit and post the results here for others.