SAT seats

Hi,
The last registration for December SAT is 02, November 2017 which is only 4 days far. While I’m registering for it, I don’t find any unoccupied seat throughout my country. I have gone for “Let the College Board assign you a seat”. So should I complete the registration by making payment? What if college board doesn’t succeed in assigning me a seat? What if my payment goes in vain then? Only 4 days are left? Will I get a seat in this short duration? Can anyone be kind enough to provide me an absolute satisfactory answer. Thanks in anticipation. !!

Need an urgent suggestion.:bangbang:

Oh please, someone tell me …

Anyone tell me :((