will not allow update, or repurchase. worthless.

I have had facetime on my snow leopard running computer since 2011-12. upon running into problems, ive been trying to update. the apple store will not let me update facetime. i have uninstalled, deleted, emptyed trash, ran software update on computer, and restarted. I have even deleted facetime out of my purchases and tried to REPURCHASE and it will still not let me. i have tried every work around, and the app store is practically invalid, not updating any of my other apps or letting me download any apps. i hope this will be resolved soon, however its not looking to be that way. 1 star is well deserved apple.

Dinozaa about FaceTime