how shall i get my work into art galleries?

[Anne]

i tried locally but the gallery owner is a horrible person and said no straightaway, i first thought it was because my work is crap and im only 17 but i found out he let younger people in,and when i asked why he let younger peolple in ,he sent me a very rude message saying i dont try for anything and people like me expect everything to come to them, i thought that was very unprofessional of him cos he doesnt even know me or gave me a chance, now i feel stupid for trying but i still want to try to get into an art gallery, my confidence is totally knocked so what could i do, i have no formal qualifications or experiece, the only relative experience i did have was winning a competition at the tate gallery where i got to hang my work up for two weeks and i dont want to sell online, please help! i would really appreciate your answers