Mpocket — Interest more than RBI guidelines

I had took a loan from mpocket and i have made most of my loans on time, but when i fail to pay 1 remaining loan due to pandemic these guys charged high fines and intrest these people are charging more than 20% per month and its mote than 240% per annum and if we fail to pay than these people charge gigh fine on daily basis and calling family friends and damaging respect towards us in front of them and send notice typed letters to there adress, they will charge 300% of principal amount for recovery amont and harrasing them th get money from innocent student, please help out of these issue. I had taken nearly 5900 and they are asking for 11000 for all dues.