I don't know a Bongo Van numbers driver, but could suggest a few alternatives. (going to link you to previous posts I've made on the same subject rather than re-write everything again.)

One is the moving company I've always used. They are a professional company, but they do have bongo vans, no idea how much they would charge for a 'smaller load' though.

Last reply on this post http://koreabridge.net/discussion/looking-moving-company-suggestions-busan

Another option could be the Zim Express minivan guys who normally act as taxi drivers for the big supermarkets, but also do moving as well. I guess it depends on how much stuff you got. Might  require several trips, but I have used them for moving a sofa and wardrobe in the past so they do do bigger items.

Again read this post here for contact details:

http://koreabridge.net/discussion/who-knows-good-van-taxi-driver