Cibil score related

I have downloaded my Cibil report and found a score 673 which is very poor, also gone through the report and some

XXX lines are there which means that your lender has not reported the credit data of a specific month for which it

shows. Now I want to know the impact of the "XXX" and " SUB" on my Cibil report and how to remove it from

my report for improving my Cibil score.

My cibil report is attached for your reference. Request you to look into and give some advice for improving my Cibil score.