Wells Fargo Mortgage reports trial period of loan modifications as deliquent accounts to credit bureau Nationwide

We paid what we were told by Wells Fargo to pay as trial period payments before our loan was modified. Recently, We applied for a loan to help with our grandkids tuition and were denied.  BECAUSE Wells Fargo reported our loan as late during the modification trial period although we paid it on time every month. The credit bureau report also says Wells Fargo reported to them that our mortgage had been 6 months behind. Now that is not true because we would definately have been foreclosed on. Talking to them they tell me over the phone, according to their records...that my September loan  payment wasnt paid until January.  She is reading off a computer. I'm telling the woman that wasnt true ,,of course she could find no reord of a letter about a loan 6 months past due. Then she asked er regarding 6 months past due. Wells Fargo is doing nothing to repair the damage done by false reporting and akso reporting trial period payments as deliquent loan payments.  Additionally, the federal government has ASKED banks to NOT report trial period payments as deliquent credit. Of course Wells Fargo does, along with added lies and wrong information to the credit bureau.  I would really like to know how to handle this situation.