thats like saying..

"i crashed my car" now you guys need to give me a new one because your car wasnt engineered good enough to withstand an impact.

Because sub amps are relatively cheap to buy fixing it probbly wouldnt be worth it. depending on whos doing the fixing. If you cant get a replacement from axiom and dont get anywhere talking to Joe (whom you should call BTW) Parts express sells a bunch of sub amps that might be suitable.

Haoleb's Audio/DIY Website