Paytm Mobile Solutions — I am complaining about the invalid paytm vouchers received on a purchase

I purchased a 20000 rupees worth of product from paytm and was promised to receives paytm voucher coupons worth 3000 rupees. I have two concerns:

1) according to the deal i was supposed to get 12 vouchers however, i received only 6. And now customer care of patym is not helping me in getting the remaining 6 vouchers.

2) while purchasing the deal, i checked the terms and conditions thoroughly and i didn't find any terms and conditions regarding the minimum order value. I tried using those vouchers but the application showed my that the voucher codes are invalid. I contacted paytm customer care and raised a complaint and after raising a complaint on paytm they are informing me about the minimum order value (Which is 600 rupees) that too, without any valid proof. How come suddenly they come up with minimum order value terms and conditions? I believe that this is cheating as paytm is hiding t&c. I was asked to share the screenshots of terms and conditions attached to the vouchers and i did provide them 6 screenshots where the term and condition regarding minimum order value is not mentioned.

I have talked to 2 different floor managers in paytm and both accepted that the mistake is from paytm end. They both promised me to contact me within 24hours but both failed in that and now they have resolved my case saying that "we hope that we helped you".

I want them to resolve this issue by providing me all the 12 vouchers with no minimum order value.
Below is the order number and complaint number in paytm:
Order number - [protected]
Complaint number[protected]

One of the two floor manger name is mr. Ashish

I am attaching the screenshots below for your reference. The screenshots contain the voucher and it's t&c. I have blurred the coupon code and in white area you can see the t&c.