cool ok Budi, you are on the program with the steel wool. If you rub it a bit harder on the darker parts you should be able to remove a bit of colour without sanding much of the cap down.
That black mark should look fine with hot auburn over it.
I'd estimate about 3-4 working days Perth to Brisbane post time, DB probably has more of an accurate post time. When did you order it ? normally DB gets the order in the post within 1 or 2 working days