First of all I am using Outlook for Mac 2011 and the version is 14.4.8. This is the most up to date version at this time (27/03/2015)

The issue is that the Inbox and sent items folder keep syncing and downloading, this issue has gone on for about 56 Hours

It is a relatively large inbox and sent folder but it shouldn't take this long.

when I open the progress window it has a solid blue bar and says downloading (for the inbox and the send). And the sync button is greyed out and the X icon on the download progress bar doesn't work either so I can't close it.

Also the attachments sometimes keep downloading (goes from 0 to 20 and then starts again) I read on another question that clearing the cache helps but that has only temporarily helped (I restarted the computer and outlook) and it started downloading them again  

Any help would be greatly appreciated. Thanks in advance