Hi Ximena,
sounds like that's dead, unfortunately - the smoke is a clear indicator. Whether the spark is due to your adapter or something else in the circuit I don't know ... I don't see why your UK adapter would provide a voltage above 5V when plugged into Colombia's 110V mains. The fact it took 2 minutes and ended in smoke could point to an overvoltage on the line but that seems somehow unlikely, too. Did you have anything else connected to the Bela? That could be a more likely suspect.
FWIW, my Belas in Colombia behave just fine and also the ones at Medellin's MAMM.
