Mobikwik — harassing and threatening

I'm using Mobikwik wallet since approximately 3 years and I'm paying their dues on time but due to some financial uncertainties i wasn't able repay last month and I've told them that I'll pay but I need few more days time but they are threating me and calling all my contacts and disturbing them when they are busy with their works. and texted me by stating he is a lawyer and a legal notice in whatsapp.

agent num : [protected]