The forms 2297 and 3363 which you received are basically asking you to agree with the decision that was made to disallow the refund requested.
You would really need to see the Form 886-A they refer to which gives the reason that your claim is being disallowed, as without that information it would be impossible for us to tell you your next steps here. You need to call the IRS and tell them the form 886-A was not included with the correspondence you received and request that they send you another copy of that form. The representative you speak with may be able to tell you what is on the form 886-A, but you still need to get a copy to see for sure just why this credit is being disallowed.
Thank you baywatch