2008 Mazda MAZDA3 lighting problems

While driving at 65 MPH on interstate 95 in fort lauderdae, fl both of my headlights failed. I was in total darkness and thank god I remembered my dad saying that your high beams are a backup system. This worked. We have had this car in for service 5 times for lamp failures on headlights always at no cost? Now both failed at once, the internet is flooded with with complaints. Is my care safe? I do not trust the dealers, they never charge me for lamp repairs, are they hiding something?

My left rear tail red tail light went out. I tried to change it but it has melted to the wires and the light housing. I am unable to change it. I am afraid this melting is a dangerous issue because it's a possible fire hazard. I searched the internet and have found many other mazda owners with this same issue. Others even have both sides melting the rear lights. I cannot even change the bulb now. This can be a danger because I cannot use my left tail light or left rear signal.