ICICI Bank — OD against FD

I have taken Overdraft (OD) against (Fixed Deposit) FD through internet banking, and now I have already Completely paid entire OD amount and want to close my OD account, have called ICICI Bank Customer Care no. of times but no proper response at all...

And now ICICI bank is unnecessarily adding interest on this OD account, which is Severely affecting my CIBIL Score and it's not fair at all from a reputed Bank (ICICI Bank); I hope would receive appropriate response and resolution from this forum...