Dear student,

If you have paid the fees and uploaded the documents, then have patience. Also you must constantly check for any new messages, and if it is written like documents is not verified yet, then wait with patience.
Because you are not the only one whose documents are not getting verified, there are many applicants whose document verification is still pending.
And as you told that today is last date for document verification.
And the officials are also not responding, then you can only wait with patience, and check your account time to time, by refreshing.
And definitely your documents will get verified too.

Also check out the following link to know more upsee counseling :-
https://engineering.careers360.com/articles/upsee-counselling/amp