Congratulations on your kitty. How did you try to introduce them? The proper way is to keep your kitten in a safe room with food, water, bed, and litter box. You begin by swapping scents. Use towels, baby blankets -- whatever a cat has slept on, you exchange it with the other kitty, so they can get used to the smell of the other cat -- this is before you ever introduce them face to face.
This new kitty has infringed on your older kitty's territory! I think you're lucky in that your older kitty hides and doesn't aggressively attack the kitten. We don't know what your older kitty is actually thinking. Your bengal is going to have to have high places to climb -- cat trees or cat shelves. And you actually need to be engaging both of your kitties in play time. Your bengal will demand it!
Things are still NEW with the kitten. It can take some time for all to adjust! Sometimes older cats just don't want to deal with playful kittens. Know, too, that your kitten arrived with smells from the cattery and that could be putting your older kitty off.
I would suggest you try to feed both of your kitties in the same general area -- your older kitty is going to get hungry at some point and food is a great motivator. You're wanting your kitties to be best friends immediately, and many times it can take days, weeks, months to get them to be best buddies -- and sometimes it never happens.
You asked about Feliway. It usually works to calm down a cat. Your cat is already calm. You might look at Jackson Galaxy's Spirit Essences as I know he has one called "Scaredy Cat."
http://www.spiritessences.com. I've never used them. Some on here have. Others here don't particularly like the ingredients. You will have to decide for yourself. But, first, I would just give this time! And have a lot of patience.