You've posted quite a few queries on different subjects (phone and email) and in different forums.
The only compensation you might be eligible for is this, for a total loss of service on your phone or broadband (if it meets the various conditions of the auto compensation scheme)
https://www.virginmedia.com/help/billing-and-payments/automatic-compensation
Email is not covered. If you feel compensation is due you are likely to have to negotiate this with VM (most probably via a formal complaint).
Assuming you are using a VM residential connection, it is for domestic use only (you mention business use in your other posts/topics).
VM's residential email service is totally unfit for any kind of normal domestic use, let alone business use. Many on here often question how long VM will keep the legacy email service running.
You may have a more successful experience setting up a business email on a business broadband/phone connection as VM's residential provision is based on a 'best endeavours' basis with no SLA.