Consumer Redressal

i m doing my iata frm akbar travels paid all my fees but jus 10000 was pending. d firm is telling me to pay 300extra as late fees n given me a reciept of jus 10000 evn though i paid 10300 rs.and i was not evn informed me abt d last date of fees payment. kindly help me out. i had to pay jus 10000 but still d notice read i hav to pay 15000. so dey must be cheating many students as we pay fees in installmnt. kindly help me out to gt d fees reciept of 10300 or get a refund of 300 rs