BIG CONTACTOR AND SUB CONTRATOR WHO PAYS FOR MY DAMAGE TO M

GAS LINES HAD TO BE REPLACED AS PER GAS COMPANY.WEEKS LATER I WAKE UP TO A LOT OF NOISE. MY JAGUAR WAS PARK NOONE KNOCK TO HAVE HIT MOVED, INSTEAD ROCKS TAR DIRT AN A DENT WAS VISIBLE TO THE CAR. NO NAME ON TRUCK AND VERY RUDE GUYS. HAD TO HAVE SOMEONE FOLLOW THEM TO FIND A GENERAL LOCATION .THEY DENIED EVERY BEING THERE. SPOKE TO THE GAS CO. THEY TOOK REPORT 3 . FOLLEWED UP UP NO RESULTS NO ONE CLAIM RESPONSABILITY . WILL BE 1 YR IN MAY I BOUGHT THIS CAR AND NOT IN THAT CONDITION .THE SUB CONTRACTOR FINALLY ADMITTED ITS WRONG DURING ,BECAUSE I ENDED UP SELLING THE CAR BELOW WHAT I PAID TO DUE DAMAGE HE REFUSE TO GIVE ME OR PAY I GAVE HIM THE LOWEST QUOTE 2000$ DEALER 4500$.BECAUSE OF THIS CAR DAMAGED I WAS TOLD BY SUB CONTRACTOR NO MONEY.CAN U HELP ME PLEASE