Amazon India — refund from amazon ref no.[protected] not reflecting in my account

Address:	India
Website:	Amazon.in

Refund of rupees 74999 was initiated on 3rd august 2019 by amazon is still not reflecting in my account no.[protected], i called sbi customer care many a times but they are not helping rather they say they cant provide information regarding this, is it the way sbi serve their esteemed customer, should i go for legal course for its redressal? Even attendant of the call is different everytime and all are seems to be # of rude character and seems lacking in knowledge... State bank of india is seems to be a goon of banking sector.