Hello @Majid
Welcome to our community and thank you for your question!
We had similar questions here on Wefugees in the past. Please check out the information provided in these threads:
https://***.wefugees.de/102431/have-question-about-marriage-between-refugee-italy-british?show=102431#q102431
https://***.wefugees.de/102357/
https://***.wefugees.de/102279/
Of course there might be differences in the details compared to your case, but in general the procedure is the same. Feel free to ask further questions in case anything remained unclear.
Best regards,
Thorgen