Spice Jet Airlines — Refund delaying tactics

Had to cancel my flight to rajkot on 1/07/14 due to ill health. Went to goa airport and spicejet desk for refund. All formalities were completed and refund was made in my debit card with my PIN number. But no refund shows in my account till date, spicejet have just been uncooperative in helping me. They insist refund was made .pls help the amount is some 13000rs