dude, I would have thrown the kitchen sink at the guy. I took my DO letter of acceptance to 2 banks, and got my loan processed without a hitch. My letter said "osteopathic", and no one asked me what it was. If the guy plays hardball, simply pick another representative from the same bank, or try another bank. You'll find that others will be eager to give you that loan
(TD, CIBC, BMO (I actually screened the ppl at my bank to see if they knew what they were doing. The person I talked to at BMO was a mofo, so I cut them off). I actually got 2 lines of credit secured, TD and CIBC, but TD had some silly restriction of how you can't access your monies longer than 3 months from your date of matriculation), so CIBC it was! The other thing is, all banks have the ability to negotiate your interest, it's just a matter of whether they are willing to do it for you. If you actually have a banker you've know for years, you can negotiate a much better rate, even below their public offering of prime + x%.