Credit card Cash back issue due to Pay TM customer care misguided me

Credit card Cash back issue due to Pay TM customer care misguided me.
Issue regarding No cost EMI on purchase of AC Order ID - 5060164420

Order Placed
on Sat, 28 Apr 2018
Order ID - 5060164420
There was an offer no cost EMI and 10% cashback up to RS 3000 on Paytm mall payment by Kotak credit card to buy on AC on 28 Apr 2018.
I opened the PAYTM Mall application to buy AC through NO Cost EMI. However, No Cost EMI option was not visible on PAYTM Mall application. Then I called to the customer care executive (Bupesh) on 28th Apr 2018 and told him that I want to by AC through No Cost EMI but this option is not visible. Then how can I get No cost EMI and 10% cash back on Kotak credit card to buy an AC. He told me that you could choose EMI option and make payment through Kotak credit card. Before 15 June, 10% cashback (Rs3000) will be credited in your account and EMI Interest will be credited in PATTM wallet. I had confirmed several times with him and he assured me on this.
Then I bought the AC through EMI option and Kotak credit card accordingly he said. After few hours, I dropped a mail on care@paytm.com on 28 Apr 2018 9:24PM and mentioned all the points, which had discussed with Bupesh.
AC delivered on 1nd may 2018.
I received a mail from Pay TM on 4th May 2018 5:00 PM. He told me that you have not opted for No cost EMI option so you will not get this offer.
I told him several times that No cost EMI option was not visible on my PAY TM mall application and that was the reason I called to customer care executive before order to know this and PAY TM customer care guided me over phone to get the benefit of No cost EMI. This is not my fault. Therefore, I need all the benefit, which I discussed with Bupesh.
There are given some reference number, which I had discussed with customer care, and they told me that I will get all the benefits which I has discussed with Bupesh
1) Reference no – 63220230
Date: 28th Apr 2018
Customer care Executive name: - Bupesh

2) Mail sent on 28th apr 2018 9:24 PM
3) Response received - 4th May 2018 5:00 PM

4) Customer care Executive name :- Priti Jain
5) Customer care Executive name :- Manish
6) Reference no – 66261944
Date: 16 May 2018
Customer care Executive name: - Nitin
7) Reference no – 65326003
Date: 26 Apr 2018
Customer care Executive name: - vishal


Today 2 June 2018, I called to customer care to know the update, she took my time 1 hours 20 minutes to check this issue, and she told me that I am sorry we cannot give this benefit to you.
I told her this is not my fault. Pay TM customer care misguide me and I sent a mail on same day and PAY TM had not responded my email in stipulated time frame so I was not option to cancel the order . So, PAYTM will be responsible for this and I want my all benefits.
I would request to PAYTM. Please check the recording of Bupesh and take the action on this.

Regards,
Rajesh