Cant update or download

I tried to update WOTB for version 2.9 but it wont work. I had it connect to Game Center so I deleted it and try to redownload it but It wouldnt download. This is a really great game and I would like to keep playing it. Please fix this problem. I had this game for almost a year now and never had a problem like this. Sometimes it just glitches and my tank wont move or goes into the ground but now I cant play at all. You guys are doing updates to the game and that is good but I think maybe you should do smaller updates so it wont be like this.

NINJAEX about World of Tanks Blitz™, v2.9.0