1986 FORD RANGER Tires Problems

ON 2/25/2000 I BOUGHT THESE TIRES AT SEARS AUTO CENTER IN FINDLAY OHIO. THEY HAVE NOT MAINTAINED THE CORRECT AIR PRESURE. I HAVE TO PUT AIR IN THEM EVERY OTHER DAY . THEY ARE NOT SAFE TO DRIVE ON BECAUSE THEY ARE CONSTANTLY LOOSING AIR PRESSURE. I HAVE BEEN BACK TO SEARS ON 4/21/2000,6/14/2000,7/10/2000 AND THEY SAID THEY WOULD TAKE A LOOK AT THEM AND EACH TIME THE TIRES CONTINUED TO LOOSE AIR PRESURE. ON 9/22/2000 I WENT TO SEARS AGAIN AND THEY SAID THEY WOULD LOOK AT THE TIRES. I SAID THAT YOU HAVE ALREADY LOOKED AT THEM 4 TIMES AND THEY CONTINUE TO LEAK AND I WANTED TO KNOW WHAT THEY WERE GOING TO DO ABOUT IT. THEY ASKED ME WHAT KIND OF TIRES THEY WERE AND I TOLD THEM FIRESTONE RESPONSE. THEY SAID THAT FIRESTONE IS RECALLING ALL OF THEIR TIRES AND THAT I SHOULD CONTACT FIRESTONE...