My opinion is that in this business can succeed without sponsors, but of course it's nice to have his support. Try to send him messages from time to time and that's all you can do. But you can try to contact the co-sponsor or your upline, and also a2a friends. Participate in forum. Read launschpad and SFI basics, training .. explore, be persistent and do not give up because this is YOUR job.
Good Luck!