Your account has been banned without you doing anything wrong.
"Before you can play we need to collect additional information for your account."
Getting an error when trying to buy champions in the store.
Your account doesn't have the skin you selected.
Do that and your account will be secured completely.
Forgot your account details or lost the email? We got you.
"Your account does not meet the age requirement to play League of Legends."
Getting "credentials don't match" error some time after purchase.
Your problem isn't mentioned or your case is especially quirky? Feel free to contact us.