Did you play and fully complete a total of 10 games? Usually if you AFK or get DC'd in a game it doesn't count. For the chat restriction at least.
For Hextech keys and loot; I don't think those rights are automatically given back once you receive a blemish on your account reputation and finish out the punishment time. I think the "average" (don't quote me on that lol) is it takes 2-3 months of continuous positive play to get your hextech crafting privileges back. Even for a 10 game chat restriction. There is no set time when you'll get it back, but I think that's the estimated average it takes. Could be shorter or longer, it all depends on your attitude and how quickly you reformed.
More information:
HOW DOES BEHAVIOR AFFECT LOOT ELIGIBILITY?
If you've been punished recently for negative behavior, you'll be locked out of earning chests and keys from playing games for a duration of time.
The length of time you're restricted from earning loot is relative to two things:
- Severity of punishment. You won't earn loot for the duration of your punishment, be it a temporary suspension or a chat restriction.
- Signs of reform. Once your puinshment has ended, you'll continue to be restricted from earning loot until you're recognized to have made significant progress in amending your past behavior.
There isn't a specific timeframe for this--it all depends on your behavior.
I hope that helps :)