2018 Chevrolet Tahoe Body & Structure Problems

I PURCHASED A NEW 2018 CHEVROLET TAHOE WITHIN THE FIRST YEAR THE SUNROOF STARTED LEAKING. I HAD IT REPAIRED THE FIRST TIME IN AUGUST. SECOND TIME IT WAS REPAIRED WAS IN NOVEMBER. NINE DAYS LATER, IT LEAKED AGAIN. I TOOK IT BACK FOR THE THIRD REPAIR AND GOT IT BACK 6 WEEKS LATER. DECEMBER 21 I GOT IT BACK AND IT LEAKED AGAIN THE WORST EVER IN 48 HOURS. PLUS THEY DID DAMAGE TO THE INSIDE OF MY CAR. SOME OF THE DAMAGES WAS CAUSE BY TRYING TO GET THE OLD HEADLINER OUT AND THE NEW ONE PUT IN. WHEN IT RAINING AFTER THE THIRD TEMPT OF REPAIRING IT NOW WATER START DRIPPING WATER OUT OF THE SPEAKER ON TO MY DRIVERS SEAT AND DOWN MY STEERING WHEEL ON TO MY HAND. EVERYTIME IT RAINS THE INSIDE OF MY VEHICLE HEADLINER GETS WET. I AM WORRIED ABOUT MOLD AND MILDEW. MOISTURE BEING INSIDE THE CAR. PLUS THE SAFETY OF MY VEHICLE WITH IT HOLDING WATER IN THE HEADLINER.