On play.fiba3x3.com, there are ways to merge your duplicated profiles into one official one in your own control. However, you need to send the user support the exact web addresses (URL) in format like below
https://play.fiba3x3.com/players/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
You can search the Web addresses from the play.fiba3x3.com player directory at https://play.fiba3x3.com/players
Please also indicate clearly which one is the final profile you want to keep.