In almost all makes and models of fridge, there will be some kind of dial inside the fridge to adjust the temperature setting. If you find your food spoils even when it’s in the fridge, check to see whether you might have bumped or nudged the temperature control by accident when you were getting something out of the fridge. On the very warmest temperature setting, food probably will spoil, even if the fridge is working perfectly.
Also note that warm air rises, and cold air drops, so if you find that something on the top shelf is consistently going bad, try storing it on a lower shelf. It is normal for the temperature on the top shelf to be as much as 4° warmer than on the bottom shelf. If the temperature dial is correct, and food on all the shelves is spoiling, you’d better send for YourPro to check out the problem.