Airtel Prepaid — my calls are been tapping

Address:

Old Mig , Phase - 1, Hyderabad, Ranga Reddy, Andhra Pradesh, 500019

Hi,
I am sandeep k. I have an airtel prepaid connection. My mobile number is [protected]. I could hear voices and my own voice. What ever i talk it will repeat. This is been done since june 2019. I want to raise a complaint and want to know what is the problem. Is my phone been tapped or not i want to know. And want to what is the legal action that can be taken who is doing all this. Hoping for a good solution.

Thanks
Regards