weird..maybe it got a fracture during shipping or something and the tap caused it break. i have 2 nammor hoses, never had any problems with the tips breaking or anything, and i pretty much manhandle them when i clean them.
heres a couple things you can do:
1. since its only been a week, i'd say ask for a replacement tip
2. buy one of those glass tips once orders start being taken
in the meantime while you wait for a new tip or something, i'd suggest gluing the tip back together, just make sure the glue doesn't clog the hose [maybe you can put a bic pen through it while it dries, then remove it once the glue dries]