Hey mam! Someone blackmail me and she say pay...

It is clear that you have been subjected to a fraud and therefore you have to file a complaint with the Qatari judiciary and its public prosecutor, stating the details of the incident in the complaint list with the need to mention the names that dealt with and the need to include in the complaint list the names of people who know the details of the incident to request their testimony, as well as you must request through the list to recover your money by the girl.
*** As for the legal basis for your case, it is a fraud crime according to the provisions of the Qatari Penal Code and its penalty is imprisonment and a fine based on the text of Article 354, which stipulates:
One is convicted of no more than three years in case of seizing, for themselves or others, movable properties, debt or quittance bond, or canceling, spoiling or modifying this bond by using fraud means, assuming a false name or a fake character in a way to delude the victim.