Where I will find that "id" you are talking about? I just have address of my wallet where I send it.
I follow SiaCoin every now and then but yes I hate the explorers of most alts. Try this other explorer explorer.siahub.info.
User this: (replace ABC with your address) see if it works.
https://explorer.siahub.info/hash/Also, check that you got the Polo withdrawal confirmation email.