Delay in clearing default status

Been battling to get proper assistance to clear a default status . MTN is not able to provide me with information to whom the clear request status was sent to, although confirmation was given that the request was sent to the credit bureaus on 11 Sep. I cant afford to log a dispute and wait another 20 business days before the outcome is successful. I need to procure a vehicle for work purposes , and not able to succeed , due to this pending issue dragging . Im also not able to log into my profile , as my email address is old. I hope someone at Transunion will take ownership and assist me with the above.