Finally cleared the clogged with a nail. Just heated it up with a bic ligter and jammed it through. Took 2 attempts to finally dislodge the clog.

As for the right extruder that refused to unload the filament, I just cut it off and let it feed through. Had to unload it so I can make room for the nail to go through the clog at a straight angle.

I removed my dispute with aliexpress. Printer seems to be working fine now.

Except, it still can't print my knee replacement as good as makerbot.