I just tryied to swap stratis to strax but did not receive anything on my strax address. why?
The best place to ask for support is in the Stratis discord group. Both community members and developers are quite active there. Also make sure you follow the instructions posted on the official website.

They fired me for no reason. They banished me for no reason. Because I wear a pseudo supporter of a project. I have STRAT and I got ripped off by STRATIS. It has become STRAX and I want the refund !