Voltage settings

I recently bought a plx 500 and I received it from Canada.
I'm based in London, I didn't know that I had to change the voltage setting from 110-120v to 220-240v so I plugged in and it went on for a second and then off. Then I changed the voltage to 220-240v but the damage was already done.
Could you please help me to fix the issue and let me know if there is a repair center in London?