Any amount paid in satisfaction of any penalty imposed pursuant to subsection (c), or any amounts realized from the forfeiture of any property interest or proceeds pursuant to subsection (g), shall be covered into the Treasury as a miscellaneous receipt. The head of the department or agency concerned may, in his discretion, refund any such penalty imposed pursuant to subsection (c), within 2 years after payment, on the ground of a material error of fact or law in the imposition of the penalty. Notwithstanding section
1346
(a) of title
28, United States Code, no action for the refund of any such penalty may be maintained in any court.