Slackware and ISO27001

I have recently encountered the following problem ... hosting company offering VPS turned off virtual servers running Slackware and refused to turn them back on citing changes in their ToS requiring something like only ISO27001 certified operating systems be installed as GuestOS on their hardware.
And claiming that Slackware as an operating system had no such certification.
AFAIK this was not a singular case...

1. Is Slackware (14.2) ISO27001 certified? (I couldn't find any info on this.
2. Will the upcoming 15 release be?

Assuming NO to both questions above, what can one do as deployer of Slackware based server faced with such demands from hosting companies (AFAIK it's becoming a trend - thus ever decreased hosting options) - does such certification rest with the distributor (Slackware Linux Inc) or with the user/deployer, or is it something of a joint thing? (IDK)