Woolly Aphids still on the plant

Fluffy things were found on my curry leaf plant about a week ago, and they are identified as woolly aphids.

I removed the stuff with my fingers but the situation is not improved since then. Rather, I found a few more spots with the insects.

My plant No.1 even had sooty mold which appears to be caused by the secretion from the aphids.

The woolly stuff is from the grown ups, but there should be so many larva (children of the grown up aphids, so to say).