2012 Kia Optima Equipment Problems

I HAVE NOTICED OVER TWENTY TIMES THAT THE TRUNK WOULD OPEN BY ITSELF. IT WOULD BE FOUND OPEN AFTER I GET TO MY CAR OR WHILE DRIVING IT WOULD JUST OPEN UP ON ITS OWN. LAST MONTH MY TRUNK, WAS SHUT, DOORS LOCKED, WE HAD A HEAVY RAIN THAT NIGHT AND THE NEXT DAY I WENT OUT, AND THE TRUNK WAS OPEN UP ALL THE WAY. THE TRUNK FLAP WAS SOAKING WET AND UNDER IT, THERE WAS A FOOT OF WATER AND KIA DOES NOT GIVE YOU A TIRE WHEN YOU BUY A NEW ONE. IT COST ME $80.00 TO GET EVERYTHING DRIED OUT AND WATER REMOVED. THERE IS A PROBLEM WITH THE TRUNK OPENING AND THE KIA DEALER SAID THAT THEY COULD DO NOTHING COULD BE, DONE WITH IT OR THE KEY THAT OPENS IT TOLD ME. KIA SAID THEY COULD NOT FIX THE FREQUENCY FOR THE KEYS AND THERE ARE TWO PEOPLE, WHICH HAVE DIFFERENT CARS THAT THEIR KEY WILL OPEN MY TRUNK DOORS AND EVEN TURN ON MY LIGHTS. THE TRUNK CAN BE SHUT AND YOU DRIVING DOWN THE ROAD AT 55 MPH AND IT WILL OPEN UP AND BLOCK YOUR VIEW AND IT COULD CAUSE A WRECK IF YOU ARE CHANGING LANES. *TR