keep trying to download the new patch and get to 71% and then this msg pops up

The patch "pc-game-hdfiles\Wow.exe" could not be applied. (Invalid source file size: expected 7703192, actual 7393944.) If this problem persists, you may be able to solve it by uninstalling and then reinstalling the game. If you are unable to correct this problem, please contact Blizzard Technical Support. (BNUpdate::PTCApply)
To check this installation for problems, click the "Repair" button. The Repair tool can automatically fix many update errors.

ive tried running as administrator and repair but still no go T.T
any one else having this problem?