Bajaj Finserv — Not receiving call and penalty not waiver

I have taken personal loan from bajaj finserv but some of personal issued that time i have missed the EMI. But after that bajaj finserv employee call me and said me Sir pay your principal amount that is 13953 And your penalty will be waiver so don't worry first pay the amount, So I have paid that much amount 13960. Bajaj finserv employee Mr. Ajay and Muskan told when you do the payment you can get letterhead AND NOC from our side and your penalty be waiver. After payment they not receiving my calls and not provide me and documents from bajaj finserv. They people cheating with me and not pick my calls also and I have recording also. so i have request to please waiver the penalty and give me the letterhead and NOC.

Mr, Ajay & Muskan (DELHI)
mobile : [protected]

My number: [protected]