I am empathetic to your situation. The protections listed in the TE manual are in reference to the device output; they don't cover extreme overvoltage on the power supply. The amp can likely handle transients on the supply, but this situation was like opening a tin can with freight train.
Quite likely, more than just capacitors suffered terminal damage, and it's quite possible that traces were lifted off the pcb. If the amp will be repaired, all sections of the amp - power supply, preamp/equalization, output - need to be inspected. I could not find a schematic for the amp, but I found a photograph of the top side of the board, and indeed, there is a 120V/220V jumper on the inside.
I sincerely hope that TE customer service will offer you an economical solution.