On Nov 24, I travelled from Delhi to Singapore. While in line for Check-in, I was approached by Gauri, the Duty Manager. She asked if I would like to purchase a upsell/upgrade to business class for 23, 500 INR. She assured me that this was a Boeing 777 with lie-flat seats in Business class. At the gate, i noticed the aircraft was a 737. The seats in business class barely recline, and row 3 does not recline due to divider/bulk head. So I asked the gate agent to call her and reverse my charges. The gate agent changed me back from Business to Economy. Gauri and the Cashier Alok met me at the staff entrance and "processed" my refund. I asked for a receipt and they said it was mailed to my email address. I have so far not seen the receipt, nor have I seen the refund on my credit card statement. I have written to Jet Airways multiple times, but no response yet.