Q: if the company put the immigration bann cani try the government job before one year
A: Your situation is actually very simple. You have a ban and that's a fact from your side. This means that no entity (private or government) can apply an employment visa for you during your ban period. However they can hire you to work - but you will be on a visit visa and NOT on employment - which is a huge risk both for you and the employer. If you are thinking that landing a government job will remove the ban and have the ban remove - then it's just like saying the government is above the law. Is this what you are trying to convey?