If you are a Virgin Media customer report it here Report a website or emailing email@example.com
FYI: Web Safe, and similar services, will never eliminate the risk because they rely on information to correctly categorising the website and: (a) not all websites are categorised; (b) uncategorised website are not blocked; (c) websites may inadvertently show objectionable material, for example search engines even though by default set to show moderated results.
Thanks for using the forums to get this issue looked into with your websafe problem, I am sorry it is not giving you the complete protection that you need against certain sites. I have a link here that helps with child websafe and explains how it works. I also have a link for A grown-up approach to safety which has even more helpful information for your issue.
Please have a look at both these links and follow any instructions they have.
⋮ there must be some reason for this or is there something i can use like OPEN DNS or SAFE DNS to replace Websafe as such? ⋮
The most likely explanation remains that they are wrongly categorised or not at all.
You can use whichever DNS service you wish however the setup will vary depending on whether the router's DNS can be set or not; Virgin Media's Hub falls into the latter. If the DNS can be set on the router then that is the only change needed but if not then every device's DNS must be set.