Paytm Mobile Solutions — paytm fraud me.after shipping they cancelled my order.

Address:	New Delhi, Delhi, 110009
Website:	www.paytm.com

I had ordered for Bluetooth headset on Paytm and finished my payment, there was also some offer of cashback running with I availed, order was placed successfully, money was paid via debit card and item was confirmed and shipped however the Paytm cancelled the item on its own, while I try to contact customer care through difficulty they mentioned that item was out of stock, so seller had cancelled the order, A)how the item which is out of stock be dispatched, and I rechecked on the website the item was still in stock however at an higher price now, the Paytm/seller felt they could cancel and cheat the customer
B) Paytm owes its customers the product not just the money refunds, why to waste the valuable time of customer when you're not ready to be on the promise of item..
I am attaching the mail from the Paytm with order ID from Paytm.
Thank you
Order id- [protected]
JBL BT450 headphone of 2990.
I made successfully payment by debit card.