Hello
I'm from EU and living in UK
I would like to know how to get married in UK with mauritian guy,but the problem is his student visa refus... 3 month ago he appeal and until this time he didn't get the answer from home office

In terms of the marriage issue, please refer your question there: Family Law - Ask Me Help Desk (https://www.askmehelpdesk.com/family-law/)

Why don't you contact them and get an update on this status of his application?

Of course he did contact them, but they don't want to say anything ,the answer was "just wait"

If that's what they said, there's nothing you can do but wait and be patient.

Concerning the immigration issue, I suggest you refer to the immigration law section: Immigration Law - Ask Me Help Desk (https://www.askmehelpdesk.com/immigration-law/)

What's the rush to get married?