I am unable to play rated games even if I choose a rated game I am getting only casual games with players lower than my rating by 500 points to 1000 points
The Lichess Terms of Service were violated on your account and you were banned.
You will only play against other players that are also banned.
If you are convinced that you didn't do anything wrong you can appeal.
https://lichess.org/appeal
This topic is now closed.