To be able to verify any information on a phone number or change the disposition, follow the steps from your main dashboard:
Go to Contact Center
Contact/Call List
Add Phone Number
Click Filter
On the bottom page, you will find all the details for that particular phone number including the status of the call which can be modified. To do that, follow the steps:
Click on the little Blue Pen Icon next to the status
Go to the drop-down menu and change the status with the appropriate one
Click Submit