I am security gaurd my client fine me 500QR not my...

If the employer deducts any part of the worker's salary without justification is considered contrary to the provisions of the law, so we advise you to do the following:
1) submit complaint to the labor committee
2) File a lawsuit before the judicial authorities, and these cases are free, as article 10 of the law states:
All claims brought by workers or their heirs to claim rights arising from the provisions of this law or from a contract of employment shall be expeditiously examined and shall be exempt from judicial fees.
Subject to the provision of Article 113 of this Law, the claim for rights arising from its provisions or for the contract of employment shall be terminated by one year from the expiry date of the contract.
Note: The Labor Law of Qatar prohibits the dismissal of a worker if he lodges a complaint with any Official body regarding the work.
If the employer separates the worker for this reason, this dismissal is arbitrary and the worker is entitled to get all his labor rights stipulated by law.