Your hose is going to wear out, they all do. Of all the parts on the hookah it is the most fragile. Dont worry about a few chips or scratches, you'll be replacing your hose in about 6 - 12 months anyway.
Nammors last awhile, and depending on your smoking habits you might not have to worry about a replacement. For now, I'd call the company you ordered from let them know. I just had to do so about my hose I had come with my new KM, see the link below.