Can someone guide me if this company is legal because they offered me temporary employment for a 6-month contract but they ask me for 20% of the visa expenses when normally other companies do not ask for anything

The person claiming to represent Bob Moore Construction with this job offer is doing so under false pretenses. Bob Moore Construction is currently not offering any type of new job positions and does not sponsor, pay for, or otherwise assist in the acquisition of visas. In addition, Bob Moore Construction will never ask any potential candidate for any amount of money. No one should give any amount of money to anyone claiming to represent Bob Moore Construction.

If I could find out