How to delete a Multiplay.co.uk account?

The description of the service:
Multiplay (UK) Ltd is a UK-based family company. They have been running gaming events for over a decade. They have achieved mass exposure as the producers of the Insomnia Gaming Festival, the UK's largest video games festival, and as the Events Producer behind Minecon - the Minecraft convention held in Disneyland Paris. Multiplay is also known as a worldwide Games Service Provider. Their servers host players from 195 different countries.
Deletion complexity:
Hard
You have to contact Multiplay by their contact us page.