two ways
1) file another 485 as follow-to-join; OR
2) write to them to reopen your I485 case.
You shoud do both. In case 2) becomes infeasible, you still have 1).
1) file another 485 as follow-to-join; OR
2) write to them to reopen your I485 case.
You shoud do both. In case 2) becomes infeasible, you still have 1).