Paytm Mobile Solutions — unable to cancel this order

Address:

Hyderabad, Andhra Pradesh, 500075

The order is just placed, status is:order received, but i am unable to cancel this order # [protected], i need change the delivery address. Paytm support/help page suggesting to go to the "my orders" section, select the item and use the "cancel" button. Unfortunately "cancel" button is not available there!, i tried connecting customer support, they confirmed that the order will be cancelled, but the issue still not resolved, please help!