Shoppersstop.com — Product promised but not delivered

I ordered a watch on sale which did not
Look new and i waited for momths for that sale to arrive..i put a request for exchange and it got accepted, but after a week they revert that the order got cancelled and i checjed on their website and the watch was available, it is still available and they did not deliver my product as promised..i want my product because it was a confirmed paid order and confirmed exchange.. this is fooling the customer.