Bajaj Finance — regarding rate of interest

My uncle took a personal loan of 48000 rd from Bajaj finance after deducting processing charges and insurance they gave 44400 rs at 25% flat rate without giving any approval letter or loan schedule and in hurry they took sign on the loan proposal but when gone through the rate if interest was 40.88% for the loan of 48000 rs received amount was 44400 rs almost my uncle paid 84000 for 36 months with interest almost near to double . This way Bajaj finance cheated my uncle pls beware and don't take personal loan from such finance company.