McCombs interview invite

After a long long wait, the McCombs School of Business, University of Texas, Austin has considered me worthy enough for an interview....

I am finding things pretty stringent with McCombs. First, they do not offer telephonic interviews. The only form of off-campus interview is alumni interview. I have located three of McCombs alumni in India. All of them are in Mumbai. Did mail one of them, but no reply so far.... It has been more than 3 (business) days.. Should I mail another alum??? Any McCombs aspirants/admits/students with an off-campus interview experience listening????