49 , and his wife christina , 48 , were asleep when the men , who were armed with two pistols , broke in at around 3.30 am .
painful deterrent : the disastrous burglary attempt took place in the cerro norte neighbourhood of cordoba , in central argentina - and all of the men are currently in intensive care .
mr costa , 49 , slashed the face , arms , and necks of the raiders , who fled the property in a getaway car while dripping with blood .