That's a pretty sturdy main stem... it'll take a while to straighten out. And it may always have a kink, even if new growth goes straight up. Give it some time. But do re-pot it so the lack of drainage doesn't become an issue. You can use the pretty container as a cache-pot to hold a plastic container with holes in the bottom... doesn't need to be a "real" nursery pot, any container that fits inside will work -- yogurt or cottage cheese container, cut-down plastic cup, etc. When you water, give it a few minutes to soak in, then pour out any extra water in the bottom of the pot.