Yeap its called saint bernard lacolle cbsa inspection station.
When you go there, you will be facing the USA side, the us officer will ask you, how r u and what not, u just say i need to go towards Canadian side for the landing purposes.
He will give u a document that states intention to reject entry to states.
You will take a u turn and wait in line on the other side, the cbsa officer will ask you about the details, and will ask your status in Canada and will give you a yellow page that you will have to submit at the office.
That is it, took me almost 3 hours going back and forth and doing the whole process.
It could explain the delay
