If you bought RP in the last week or so, feel free to contact support to ask if the bonus can be applied retroactively.
" Thank you for contacting me. Unfortunately, you don't have any purchases that are eligible for this Bonus RP Promotion. I apologize for any inconvenience this may cause you.
If you purchase an RP bundle from now until January 31st at 11:59 PM, PST, you will receive the special bonus RP. "
As a long time paying customer that enjoys the game enough to make purchases, I may have been more inclined to buy more champions/skins on demand if I felt my continued patronage was more valued. This response with a quick apology and then immediately followed up with a statement telling me if I were to spend more money, has aggravated me to no end.
I would like to now apologize for any inconvenience my following promise may cause you (Riot). My wallet is officially closed until 2014. I promise to not buy any skins, no matter how tempting and no champion shall be acquired unless they are on sale. As you are a business that does not provide monetary refunds, it is unfortunate that this is my only recourse. I hope the last $100 I spent on your service will serve you well throughout the year to come.