Paytm Mobile Solutions — unable to exchange my order as order status not changing to delivered

Address:	Gautam Buddh Nagar, Uttar Pradesh, 160101
Website:	paytm mall

Order no. [protected]

The order was delivered to me earlier from expected delivery date. It was 14th october, now i want to return this because the size is nit fitting me. I post my request on paytm mall app to help me, they said the status will change in 24 hours but it is 4 days that, but it is still same i. E. Shipped which should be delivered. No response after posting my query many times. Called on paytm customer care number they are saying as order invalid for any order # i am entering.

Please help to change the status of this package