HDFC Bank — Complaint about cbc amount in emi amount

Address: Tea Board kalu di hatti , PO Maranda Tehs Palampur Distt Kangra

Sir,
I have paid all the dues in emi i.e Rs 5541, in Ccount no [protected] instead I have fined Rs 531 as CBC amount in emi ammount, I have all the emis in time till date .In this month, due to non efficient amount in my account due to my illness, I couldn't be able to maintain minimum balance
Kindly forfeiture my cbc amou of Rs 531 this month consider ing my previously timely scheduled EMIs since last 3 years
Soliciting kind favour