Apple iPhone 15 Pro Battery Drains Super Quickly, Can't Do Anything

bought the iPhone 15 Pro like, just a day ago, and now I'm already dealing with this super annoying battery drain problem. Ugh!  my old phone was iPhone 11, and even though its battery was at 79%, it didn't die this fast. Since I dropped a ton of cash on the iPhone 15 Pro, I'm hoping you can fix this problem ASAP... either figure out how to fix the battery drain issue or just call back the phones and check 'em out real good. We really need to figure out a solution to this problem ASAP. Man, when you drop a ton of cash on a fancy iPhone 15 Pro, you expect the battery to be top-notch and last long you know, for a few days...