A/c no.not matched-not got refund-?to inform correct a/c no.

You have not made it clear as whose  'a/c particulars did not match' but the hint is that of your account with Bank.

Inform them the correct bank details or request for a cheque. It happens some time that account starts with Zero but Zero does not get typed - it could also happen that you not typed ZERO at start.

Login to your ur efiling a/c by entering PAN No. and password. Click "Resposnse Sheet for CPC refund failure status" on "My Account" menu. There ur reason for refund failure will be displlayed and download "Response Sheet" and print it. There enter the correct A/c No., Bank Name and other details and post it to address mentioned in it. Ur Work is done!!