My awkward situation (3)

I updated my situation a few times by sending emails to the professor just wanted let him know I was trying my best to get through the hard application process. He replied me every time until the end of Oct, last year.
After I received my formal certification from the provincial Education Bureau, I sent him an email requesting to ask a new acceptance letter before Chinese New year, but I haven’t received any response. During In the course of this/that time I sent him email at least 3 times, called him but he was not never there, and I just left voice messages. I even asked a French girl whom I knew had met recently, to call his coworkers, and speak in French to make sure that he still works in that university. (Thanks god, there are always people who like to help me when I need help). After several times attempts when no person answered the phone, last Wednesday we luckily finally reached a secretary in his office, last Wednesday. She told us the professor had a lesson at that time, but that she would tell him after his lesson. I sent him an email again but I haven’t received any responseds. The deadline of for my grant is the end of next year. It means I have to go to Belgium before the end of next year.
What can I do? To find another professor or wait his for him to respond? Although I can find another professor, I really want to know what happened on with him and what he thinks about me. Anyway, it seems I have to take responsibility for all the delays throughout the application process. As my coworker (who went to UK a few year ago as a visiting scholar) said “ getting through the application process makes you feel exhausted, you can go until you don’t want to go any places anymore”.