I was employed at tad beer company in ajman i...

The job offer / offer Letter is considered a verbal promise for a contract, and the company can revert from it and not complete the contract process. As in regard of the residence, according to the Federal Foreigners' Residence Law and its executive regulations "Every foreigner has canceled his / her entry visa or residence permit, or his residence has ended at the expiry of the term of the permit, entry visa, or residence permit, and he has not initiated a renewal, in permissible cases to do so - during a period not exceeding thirty days from the date of the expiry, or if he / she did not leave the country during this period, a fine of no more than one hundred dirhams shall be imposed on him / her on each day he / she resides unlawfully in the country. Therefore, in order to be able of exiting the country immediately, you have to pay the prescribed fine, then departure