MAT

You may not get a good college but there are colleges which will give you admission through Institution donation quota and if you are planning to get admission, you can still give ATMA-May and MAT-May exams.
All the best.

It depends upon which college you are applying for. Some colleges need it and some colleges need your graduation score.
All the best.

There are many good colleges which will be accepting MAT 2017 May score for HR including Amity, Lovely Professional University, ITM and BIMM. Just check the link mentioned below:
goo.gl/r9TroO
All the best!

PIBM, Pune is a decent college. But if you want to do PGDM in HR then, go for very reputed college because you can pursue MBA in finance or marketing from an average college to good college but, for HR always choose the best one. Eith this percentile you didn't a get good college for HR.

You don't really have to submit your scores because you will now be selected on the basis of your performance in your GD-PI. If you still want to submit it, you must come to the college and submit.

Dear,
You need to apply online for MAT exam and appear for the exam and now you have time for September or December MAT exam because May MAT exam application date is over now.
All the best.