Loading problems with Mac App Store

Hi-

I am having issues with the Mac App Store.

Whenever I click on the store icon the beachball appears and it doesn't load (or takes forever to load and have to force quit). My internet connection is fine.

So I tried deleting it (thinking i could reinstall it), and it wouldn't let me delete (something about it being in "dock tile").

So, I got it out from the trash. Then it wouldn't let me even get the beachball saying that it is either missing some files or it is damaged.

Not sure what I did or what happened.

How do I rectify this? I just want the store back in running form.

Thank you in advance.

Alex