Bharatpe - Harassment by Bharatpe app postpe

i was using postpe app in December i converted the amount in emi for that charged was also applied to me. In january postpe suddenly asked to pay the full amount of *****. i was having ***** which i paid and i asked postpe to give me time to pay. further i also asked postpe give an option to pay the rest amount ***** in * or * transaction. but postpe denied. the postpe *rd party collection teams call me **-** times a day and talk very roughly. now collection teams has accessed my contact list in my phone and calling them.