Before prescribing a treatment, it is really necessary to gain more understanding of what is causing the problem.
---------- Post added at 12:41 PM ---------- Previous post was at 12:26 PM ----------
One possible pest that comes to mind, that could produce those small "scars" on the top of the leaves... bush snails. If you pour water through the pot (get it very wet) they may show themselves - look like little "flying saucers", size only a few milimeters. If you see those, search the Forum for notes on using coffee to kill them. (Look for posts by rbarata on the subject)
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