I went to my fiance's house to visit him.and his...

Please be aware that, according to the information provided to us in your inquiry, and with reference to Qatari law, it is possible to immediately go to the nearest police station and file a criminal complaint. It is preferable that you have a medical report explaining the nature of the assault and the consequences thereof, explaining the matter in detail, and may be referred to the prosecution and charged with assault. Presenting evidence for the validity of the claim for the purposes of summoning them and investigating. If the accusation and conviction are proven, they will be referred to the court for trial. Article (3)
A criminal case may only be brought on the basis of a complaint from the victim or his representative in the crimes stipulated in the articles:
(293) (308), (309), (323/1), (324), (325/1), (326), (329), (330), (331), (332), (333) ), (357), (389/1), (393/1), (394), (395) of the Penal Code, as well as in other crimes stipulated by law.
The complaint shall be submitted orally or in writing by the victim or his special agent to the Public Prosecution or to a judicial officer.
In the event of a flagrante delicto crime, the complaint may be submitted to any of the public authority men who are present.
** Where Article (242) stipulates penalties for Qatar, whoever defrauds shall be punished with imprisonment for a period not exceeding two years or a fine not exceeding two thousand riyals, or with both penalties.
** And then, in the event of conviction and judgment on them, filing a civil case before the court and claiming the full amount with a request for compensation for every damage caused to you.