Can an apartment legally withhold renter's

[Jil S]

verification from a mortgage company? I am buying a house and supposed to be closing on August 27 which is only two and a half weeks away. I am not sure what getting a normal mortgage requires, but I am going through a government program that assists low to moderate income households (I am a single female 2 years out of college), so it requires renters insurance from the previous 3 years. The only thing left before closing is the renter's verification from my Senior Year of college apartment.
My mortgage company has called several times with no return calls and has mailed the request as well, with no response. If this doesn't get handled in the next couple days it will throw the entire process off. The landlord company was a nightmare while I was living there, but I can't believe it has followed me to this point! Does anyone know if this is an illegal activity? Does anyone have any suggestions on what I can do? I should mention the apt company is in Indiana and I am in Georgia now, so going there in person is a last resort
After seeing the first two answers, let me add THIS IS NOT RENTERS INSURANCE.. My mortgage people could care less if my stuff and apartment were insured when I lived there..

What it is is basically a report from my previous landlords verifying that I DID live there as well as that I paid my rent on time, wasn't evicted, etc.
Also I will add that it cannot be in the form of my records or paperwork that I have (I still have my lease). It HAS to come from the Apartment Management.