Unable to download files - pls help!!

Unable to download files - pls help!!

Since yesterday customers are unable to download files that they have not uploaded even if the views are public/shared

I am a paid customer and your support phones do not work - that s crazy!

I have submitted tickets but no one answers - you are damaging my business

Same link, same views but in some cases customers can download files and in others, they cant. 

What is happening? This was working til yesterday!!