2018 Subaru Impreza Suspension Problems

SINCE THE END OF 2018, ABOUT 6 MONTHS AFTER ACQUIRING THE VEHICLE LEASE, I STARTED TO HEAR NOISES WHILE DRIVING THE CAR. THEY SOUNDED LIKE CREAKY NOISES YOU'D HEAR FROM A CAR THAT WAS 10+ YEARS OLD. AT FIRST, JIM BURKE SUBARU DEALERSHIP SAID THEY DID NOT HEAR THE SOUND, THEN AFTER ANOTHER FOUR OR FIVE MONTHS WENT BY I DECIDED TO TAKE MY CAR IN AGAIN. IT WAS SO LOUD AT THAT POINT THAT THEY KEPT MY CAR TO WORK ON IT. OVER THE COURSE OF A YEAR THEY HAVE KEPT MY CAR ABOUT 5+ TIMES, REPLACED THE SUSPENSION SYSTEM, REPLACED THE BALL JOINTS AND NOW HAVE LABELED IT AS A "SPOT WELD" ISSUE THAT MUST HAVE OCCURRED WHEN THE CAR WAS MADE IN THE FACTORY. THIS SOUND OCCURS WHEN DRIVING THE CAR AROUND TOWN BUT NOT OVER 45 MPH. IT IS MAINLY ON THE PASSANGERS SIDE BUT I HAVE HEARD IT PREVIOUSLY ON THE DRIVERS SIDE. SUBARU CORPORATE HAS OFFERED ME EITHER A WARRANTY EXTENSION ON THE CAR IF I CHOOSE TO KEEP IT OR A VOUCHER FOR $2,500 IF I WANTED TO TRADE IN THE CAR AT THE END OF MY LEASE. IN DECEMBER OF 2019 I AGREED TO THIS BUT SINCE THEN I HAVE TAKEN MY CAR BACK INTO THE DEALERSHIP AND AFTER A MONTHS TIME OF WORKING ON THE CAR THEY STILL HAVE NOT BEEN ABLE TO REPAIR THE ISSUE. I THEN CONTACTED SUBARU CORPORATE AGAIN AND THEY SAID THEY ARE "NOT OBLIGATED TO REPLACE THE VEHICLE, ONLY REPAIR THE ISSUE". THE AMOUNT OF HOURS I HAVE SPENT TAKING MY CAR TO THE DEALERSHIP AND NOW FEELING UNSURE OF THE STRENGTH OF THE BODY OF THE CAR OR THE INTEGRITY OF THE MANUFACTURED VEHICLE I AM STUCK WITH A $256 LEASE PAYMENT EVERY MONTH UNTIL SUMMER OF 2021. I AM PAYING FOR THE SAME AMOUNT SOMEONE ELSE IS PAYING FOR A NICE, WELL FUNCTIONING CAR. AT WHAT POINT IS SUBARU RESPONSIBLE FOR REPLACING THE VEHICLE? ALL REPAIRS AND DOCUMENTATION OF THIS ISSUE HAS OCCURRED THROUGH JIM BURKE SUBARU. I CAN PROVIDE DOCUMENTS FROM THE DEALERSHIP IF THIS WOULD SUPPORT ANY REASON FOR INVESTIGATION.