All Of My RP Went Missing After Buying Draven

HELP! I bought a Champion, Draven, with RP. I had 1960 RP still in my account, and Draven costs 975, so I should have 985 still left in my account, but I only have 15! I looked through all my purchased champions to see if I had accidentally bought another one, but all of my champions are accounted for, no extra. I also check my recent purchases and there was nothing extra, it's almost as if Draven costs 1945 RP, which I know he doesn't. Does anyone know how to fix this?