Which subscription are you wanting to take advantage of @richothegreat ?
Some have found using Google Chrome in incognito mode etc can help, and or clear the browsers history and cache and cookies etc which can help.
There are a few existing threads with good tips in for people finding difficulties in applying for the various Boost benefits.
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help.