you will need to use an exchanger. Check in the wmtransfer portal and you will find a list of approved exchangers. I can even see in your signature you have a referral link of one of their approved exchangers.
There are a lot of trustworthy exchanger who will do it but may be your WM passport would be a matter to go easily but still you WILL FIND SOMEONE.
rply from WM support Hello! It is impossible. We don 't execute Bank Wire to BANGLADESH. We don't accept Bank Wire from BANGLADESH. Only to pay your mobile phone: Other method isn't present.