I filed a dispute with Equifax on XXXX/XXXX/2015 regarding the balance date Equifax is reporting for a short sale we had with XXXX XXXX XXXX XXXX XXXX XXXX Mortgage. The house sold and closed XX/XX/XXXX. My husband and I were denied credit because of Equifax reporting the date for XXXX as XXXX. XXXX reported the date as XXXX. I submitted the XXXX paperwork showing the XXXX date and submitted additional paperwork to explain the dispute. Equifax responded to the dispute on XX/XX/XXXX saying XXXX is reporting the date correctly, however, instead of correcting the XXXX date to XXXX, Equifax updated the date XX/XX/XXXX!!! On XX/XX/XXXX I receive an Equifax alert showing my credit score was dropped by XXXX points from XXXX XXXX as of XXXX XXXX to XXXX XXXX as of XXXX ) due to information changing on my report. Because Equifax changed the date for XXXX to this month, it appears that our short sale just occured a few days ago instead of 4 years go which is why our credit score was impacted. I called Equifax today and talked to a rep and her supervisor. I was informed that a dispute will negatively affect my credit score and I have to " wait until things settle down and it goes back up ''. The XXXX rep said they can not change the date showing for XXXX or restore my score because " they have no control over it '' even though I have paperwork showing the correct information. I asked the Equifax rep and the supervisor to provide me a copy of my credit report from XX/XX/XXXX to XX/XX/XXXX so I can see what changed to affect my score this way. XXXX said they can not do that. On the Equifax website, the latest credit information I can see is through XX/XX/XXXX. The XXXX is the ONLY negative information against my report and NOTHING has changed from XX/XX/XXXX including no additional debt, etc so there is NO reason for my credit score to drop XXXX points in a week! As a consumer, I should be able to dispute inaccurate information being reported against me and it should not negatively affect my credit score. I understood that credit reporting agencies have a responsibility to correct inaccurate information especially if the consumer is being denied credit or refused preferred rates because of the incorrect information. I am filing a formal complaint against Equifax for refusing to correct inaccurate data even with documentation and with XXXX agreement the correct date is XXXX. I am also filing a formal complaint for Equifax dropping my credit score because I filed a dispute to get the data correct. I want this resolved.