GMAC Mortgage 's fraudulent/deceptive modification/foreclosure practices...HOW CAN THEY BE STOPPED??? Waterloo, Iowa

Put in 1st mod application to GMAC 6/23/10 (ARM Loan).  Pmts were auto-deduct from my checking & I was current until after they recv'd my app & paid my real estate taxes (not escrowed), then cancelled my auto-deduct because I was then in arrears. Tried to get them to reinstate auto-deduct & make arrangements to pay back taxes they paid, but they said not necessary...arrears would be included in the mod package (which was still in review & not even approved yet!).  They put me on a 3-month trial payment plan, all of which I paid.  I was denied under the HAMP Program, but approved for an in-house mod. On 10/13/10 @ 12:04 P.M., was hand delivered a mod agrmt. by Fed Ex.  Cover letter from GMAC required the signed documents & 1st pmt due back in their office by 10/15/10!  I called them to request add'l time to have paperwork reviewed by someone.  The person with whom I spoke assured as long as I got signed docs & payment to their office within the 15-day grace period (11/15/10), I would be okay. On 11/4/10, I received call from GMAC that my mod was denied as I did not get the docs to them in time. Tho I explained the above, didn't matter, but I overnighted signed docs & pmt to them anyway, which they rec'd 11/5/10.  Then rec'd a formal denial letter, along with their stmt (in writing & by phone) that my check would not be cashed & mailed back to me on 11/8/10.  On 11/18/10, I faxed a 2nd mod app & tho all info was same as 1st, I rec'd denial letter dated 12/29/10 that I had "sufficient" income. Phoned GMAC  & was told that was a mistake...denial letter should have read I had "insufficient" income. She found that GMAC made mistake calculating my expenses...they "doubled" the monthly amount for real estate taxes, homeowners insurance & added a credit card pmt which did not exist. Tho the person with whom I spoke assured she would submit a work order re: their error, low on trust, I req'd she send me another app.  On 1/18/11, I was hand-delivered a foreclosure notice with a sale date of 5/18/11.  My HUD Counselor approved me for a 90-day foreclosure deferment (Colorado Law) & I faxed the 3rd mod app to them on 1/26/11, again to be denied by letter dated 2/18/11 due to "insufficient" income. I  made all 3 pmts required under the deferment, extending sale date to 8/17/11, but both GMAC & their Denver attorneys never updated the sale date until recently, but to 7/6/11.  Where they came up with that date, I have no clue, as each payment I made under deferment added 30 days to sale date.  I've filed a "4th" mod app.  Also, found they cashed the check they said was sent back when I looked @ my bank statement but didn't let me know.  Way more to this story...this just small portion!! We bailed them out & this what we get in return?? Has anyone had any luck in getting help on this...legal or otherwise?  FYI:  I am on the Fed & State Do Not Call List for solicitation/marketing, will not answer an unknown call & will file a complaint if I'm contacted by a company soliciting debt/credit/foreclosure help.  I do welcome assistance from a lawyer or government office.