2001 Infiniti I30 Rotten Egg Smell

I recently replaced the muffler and full exhaust system in my car at the dealer.

As soon as I picked up the car and drive it home about 20 minutes away, when I opened the car door I immediately received a fowl rotten egg smell. I thought the smell would go away in a few days since the exhaust was brand new, but now I can smell the rotten egg smell in the cabin of the car.

Could you please advise.

Thanks much.