I don't have that problem, though i have one even worse:
My game works well, lobby is fine, voice chat is fine...
But in game... Now that's the gold nugget right there.
You see, i get lag spikes (as in MS/Ping, not FPS) that goes from 50 to 4000+MS in an instant.
Ben happening to me since August but only a couple of minutes ago that i decided to report it, because i am concerned it might be a Bug. I can't even play alone against BOTS!
Now listen to what this guy has got to say: I know it might sound BS, and it might even frustrate you, but have you tried to re-instaling the game?
I know, i know, a tedius and very time consuming problem, but who knows, it might have ben League's spaghetti code that might have got corrupted (yes, it happens more often that you can even possibly imagine).
What i wold sugest you do, is wait a couple of days, maximum a week, and see if you get any reply from a Riot employee or anyone that has advanced knowleadge on the subject.
If you're out of options, best thing you can do is just to "bite the bullet" and see if re-instaling the game does you any good.
With that all said, i must bid you farewell!
Feeling impatient and frustrated about your problem?
Here's Skarner. Skarner lost his entire species. His brothers and sisters are supposed to be in the middle of hibernation, unable to wake up for the next millenia. For some reason, he managed to wake up. Maybe he was hungry or something else happened. He does not know. But what he does is that his kind is being hunted and digged from the dirt, because their crystals on their stingers are filled with very rare and powerful rune magic. Removing it, kills the living being. Amumu might be sad all the time, Omega Squad Teemo's past might be super sad, but Skarner...
Skarner has nothing...
And he is still looking for them.
Remember the gamemode Dominion?
Remember the map that was supposed to be his main story point, the map that was supposed to fit into Skarner's Lore?
Yeah...neither do I... Riot Deleted it.
So if you're feeling sad because of that problem, you're impatient to wait for a solution and you're really, REALLY mad about people not caring about you... think of Skarner, and what he has ben through...
Maybe, JUST maybe, you might get a bit of inspiration, and give yourself a bit of extra patience. Soon, people will help you out.