This is in reference to your letter received dated (date), in which you requested a three month extension on your (type of) loan, number (number)
After complete assessment, we are sorry to inform you that we are unable to grant you any further extensions for the payment on your loan.
We are sorry about the difficulties you are experiencing, but we must insist on receiving your payment by (date)
We hope that you will be able to find another solution to your problem. Please feel free to contact us for any more doubts and clarifications.