Forza Horizon - Cannot read disc, clean with a soft cloth... it's downloaded off the marketplace

I was sent here by Microsoft xbox support and was told to contact someone who can assist with this issue, as they don’t seem to know a single thing.

Case Number: 1338938093

This has been an issue (for some) since the launch of the digital game. As far as i am aware there is no workaround, other than getting a disc copy.