RBL Bank — disappointed with customer service, requesting for reversal of finance charges

Hi there, i am akshatha, i am using my rbl credit card from more than a year. My card no is [protected]. Actually i approached customer service over phone bcz there were finance charges on my account which is around 2300 rs. I requested for waiver bcz i made the full payment within the grace period, i was hospitalized from past 2 months that was the reason i failed to made the payment on march statement, mistake was from my end so i didn't ask any reversal for that, but for april statement the total due was like 69000 n payment due date was 3rd may and i did multiple payments from 3rd to 6th may. The supervisor informed me that they received payments by the grace period but i paid 480 rs less than my payment due, which means i nearly paid 99.9 percent due. May be bcz of multiple payments i confused n paid 500 rs less... I requested for waiver bcz 2300 rs charged for 500 rs lesser payment which is too high for me, but rudely they said it is not possible bcz in last year i got waiver of over limit fee. I really disappointed with their behavior, if i don't make the payment also i will charge with 2500 rs only but here i tried my level best to clear my total dues but bcz of 500 rs less payment i was charged with 2300 rs.. I am requesting bank people pls help me with the reversal. I failed to made that 500 rs payment not intentionally, it was bcz of some confusion. Hope i will get reply from your end. Hopefully i will get some positive support from bank end. Thank you..