NRI uncle demands gifted money back

Sir, I am married and living in India. During year 2002, I visited UK as a visitor when I was a bachelor. My uncle sponsored me and helped me by sending 2000 GBP towards the expenditure. I had stayed there at his home for 12 weeks. Now, as of today, as my personal relations with my uncle and his family are no good, he demands that 2000 GBP back after over 15 years. At the time of sending those money he had not cleared that he had given the money on the basis of paying back to him. In fact, during the appeal for the visa, he represented before the adjudicator for determination and reasons followig points: 1. He said that he and his wife always stayed with mye and my fathers' family during indian holiday. 2. He had always felt guilty for not inviting me and my family to the UK for a visit. to return the geneoristy of the hospitality that had been extended to him by my family, he invited me and helped me with those money. So how can he demand gifted money back? Is this legal?