It would be nice to see Blizzard compensate people for issues especially those with data caps. Good luck to everyone else.
Here's what fixed this problem for me. Luckily i still had the old dowloader.1° Run the downloader and select the directory that contains the diablo 3 installer. It should first be checking for the whole 7.6 Gb file. Then the downloader thing will appear and try to download a file just over 8Gb in size. Close it.2° After that you need to uninstall diablo 3 or the dowloader will keep popping and it won't let you install it (at least thats what it did for me) 3° Now you should be able to install the game properly
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