Yes, that's basically why you got your license suspended. You were found guilty of the charge of "failure to respond a default conviction" so that's why your license now is suspended. It has nothing to do with your violation points adding up 11 or more (since it's not your case, because they add up less)
So can I get another date for my hearing? I mean, I know I can't postpone it now, but I'd like some sort of appeal to explain or get a chance to another hearing.
The appropriate TVB must receive your request by mail at least 10 days before the date of the scheduled hearings (your hearing happened already) but you can request another hearing in person at that office.