One97 Communications — Harassment from Postpaid collection team

My paytm Post paid limit was 10000 and i was not able to pay the amount because of hospitalization and 31st May i have paid 6500 balance I have to pay 5485 rs. but recovery agenst asked bme to opay balance on 7th June itself otherwise my file will move to field .Then i informed that on or befor 30th June I will clear the dues. For delayed payment they have charged 1198 Rs. Finance charges . Today I have received message they will block my UPI and i cant use UPI and auto debit also will happen. So i jjust want to know did paytm have the authority to block my UPI .