AFAIK, you need to have 20 xrp to activate that wallet. But that should suffice to activate that wallet. I've sent 20 xrp to my wallet as well years ago to activate it but I don't know in your case if you have to deposit another 20 xrp just to activate it because that's how it went for me.
It is 10 XRP and not 20 XRP. Please read what we have posted before posting.
My bad, thanks for the correction. Yeah, it was 10 xrp.
So if the amount was right and it had exceeded, he should recheck the address and the mistake probably was on that end then.
@OP, it might help if you're going to post the address for tracking.