Viaplay wrongly classifies IP as VPN

*cHi All,* I'm wondering if anyone here could help me out in reaching someone at Viaplay, we have customers that rent a internet connection from us as an ISP and are getting a message when trying to start something that they are behind a VPN, even at the office I have the issue (we are behind our own network too) so it seems they've classified at least some of our IP blocks wrongly. I tried contacting them on Twitter, Facebook messenger and their own webchat but all I get is we are currently business and it takes longer than usual to answer but until now no answers to any of them. Would like to get this solved pretty much. Best regards, Jimmy