Rolex explorer ii bought 4 days ago gmt issue

[Hadiaspossito]

So I purchased a Rolex explorer ii less than a week ago brand new with warranty. My gmt hand runs slower than the hour hand I set it on equal time and it keeps distancing itself until eventually the hour hand runs a full cycle around it, the gmt hand moves just much slower than the hour hand. What could be the issue? I'ts keeping perfect time it just that my second time zone doesn't keep up with it... I dropped it off today I'm really upset and almost regret having bought a watch with the second time zone function now...