Those are some....interesting shapes, lol.
Every year I've dealt with deformed Sarr leaves, and both times I could attribute it to thrips. I'm not sure that's what you've got going on though. Wouldn't hurt to douse them with a coat of Neem oil, though, or if it's available to you, Captain Jack's Deadbug Brew, which has Spinosad, a bacterium found in the cellar of an abandoned rum factory (I mean...how could you NOT use that?).
In all seriousness, both seem to perform equally well for me, except the Captain Jack's doesn't reek to high heaven like Neem oil.