well, you are doing the right thing by getting help.
you don't want this to happen again right? go recheck every single point of connection/termination of your wiring. fix it now, so you dont have a fire later - that's my advice
you'll have to buy a new amp, no one will repair them if they're less than $100. not worth it imo
and in reference to fiverman below me, generally its not that easy. OP can fix one cap if he wants but i doubt itll fix his issue. it's a $100 amp and one capacitor isnt usually the only problem
for the hell of it OP, post pics of the amp guts