Paytm Mobile Solutions — regarding non - returnable product

Address:

Udham Singh Nagar, Uttarakhand, 244713

Dear sir,
I have received a product (Order id - [protected], la melodia thermal top combo of 3 l size) yesterday, in which one size is ok but 2 item size is not correct, it does not fit me. I know the the item are not returnable but when a seller send wrong size who will responsible for it? This is too tight i have also purchase earlier thermals with same size description, but they all fits me. It is not even m size, it is s size.
I have also talked customer executive but they did not help me i am very disappoint this time.
I am purchasing from paytm since 3-4 year, and i have never faced this type of problem. But this time they really disappointed me.

Regards,
Chitrali