Make sure, if your headlights have replaceable bulbs, that the repair person is not touching the quartz glass with their fingers. The bulbs can be safely handled with tissue paper or similar. If the quartz glass is touched with fingers, it can be cleaned with rubbing alcohol using tissue paper, paper towel or cotton.
If touching the quartz is not the problem, you might want to double check your charging system voltage while driving to make sure that, at all times, the voltage does not exceed 14.5 volts dc.
I sometimes wonder if bulbs that are less than perfect get into the parts supply system but I have no knowledge of manufacturers quality monitoring of lamp production. If all other measures fail, try another brand of bulb.