Well I don't think it matters how many times Ты Сообщить something. Every time Ты click Сообщить after the first time it tells Ты you've already reported it. Reporting it a bunch won't make it go away sooner.
And the F4 are busy and have shit to do. I'm assuming they're the ones who review reported Обои and decide whether they should be removed или not. I'm sure they'll get to it eventually.
As sarabeara сказал(-а) Ты can Сообщить a pic just once and if Ты want a pic to be removed then it must be reported by еще than 2 fanpopers, of course just by reporting once the pic won't be removed and F4 don't remove anything as they've not got time to see each single inappropriate pic and remove it, it's done by the system.
How long назад did Ты first Сообщить it? As others have pointed out, the F4 can be busy. They don't have enough time to react to every report, complaint and request секунды after it was made.
Also, did Ты explain why the image was reportable clearly enough in the report's notes? The F4 member who deals with the Сообщить might not be a WWE Фан and might therefore not know what's wrong with the image immediately (if it isn't obvious).
Don't bother reporting the same picture many times. It just spams the reporting system.
