is there any best number to call University of the Cumberlands: NO response for days

Hi, I have been trying to reach University of the Cumberlands but no response. The machine keeps saying "Please wait for the available agent" and this is number I used 8557917201. I got this university name from Sajha, I heard it's a good one. I have to join a university asap. I need to know if they require any tests like GMAT or GRE if I already have a Master's Degree and other documents, and how long does it take to process the application and other admission questions. But no response. What should I do?