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Fridge Freon Small Leak

Hello, I was cleaning the freezer in our small (newish) fridge upper freezer area and put a small hole in the freon and the refrigerant was hissing out. Is it possible to plug the small gap and put new refrigerant in? We need it to be safe as using it in our guest room and want to make sure that guests are safe but it was relatively new and hoping to be able to repair it as seems such a waste! The Brand is Haier. Many thanks in advance!