Mobikwik — abused call

I had taken a loan from MobiKwik
.due to system error my ECS was not active after that I got a call from his employees mr Abhishek he ask for cash &I given same but still 3 month his employees take it in his pocket I call several time but no one responded us after that I got a call from his recovery department she has use abused language from land line treat like a janbar

If MobiKwik is a brand then company should have educated person not like janbar

So kindly take action against on him