Cognizant Technology Solutions — Non maintenance charges

I have worked for 1month in an organization "GENPACT" and my account in HDFC was opened and i have left the company after one month since then HFDC is charging non maintenance charges and my account is negative now.
if my account is non operational then why non maintenance charges is applied to it. now account is in negative.
kindly requesting you to remove the maintenance charges as I don't want to continue that account.