Paytm — Cheap item! Return confirmed but not done

I have ordered a iride tshirt i got the delivery and i found priduct of a very cheap quality. So on next day i mailed them that i have to return this product credit my money back. On 1st mail the asked me to send pics of the product and pick up will be done on next day but it was not done so i have mailed them about this more than ten times in some mail they say the wil do it in 2-3 days and in last mail they said it wil take time and they dont know how much time it wil take... Worst service
Please provide me a costumer care number of paytm if any one has i am fed up of mailing them..