Here are their numbers to call them back. Make sure you have blocked your number, and do not give it to them. When the recording asks for your "phone number on your account", hit "0" until they tell you they will connect you directly.
1.317.805.8000 or 1.800.338.7777
1.317.805.9941 or 1.877.968.7476
Fax: 1.317.805.9335