I am so sorry you have experienced this result with your Botox. Don't give up on Botox (in the right hands) for the future, but for now, please try to just hang in there and wait it out. If you try to put Restylane or Juvederm into the area, it will in all likelihood make it MORE lumpy, risk damage in the area, and look wrong once the Botox does wear off in 2.5 to 4 months. And it can last up to 2 years there.
Sometimes, Botox is most active in the first month or so and then MAY weaken if you are lucky, allowing those under eye lines to be less dramatic.
Try seeing a different board-certified dermatologist or plastic surgeon to see if there is something else they may suggest, a special under eye cream or gentle lateral massage of the lower lids to help excess fluid be removed from the area now that the "squeegee" orbicularis oculi muscles are too weak temporarily. Good luck.