Avanti West Coast complaint: Misleading information sent in an email

I received the following email-
Hi Julie,

We’re getting in touch as you’re due to travel with us on 08 Apr at 10:02 from London Euston to Chester.

ASLEF has announced a range of industrial action affecting multiple train companies between 05 and 08 April.

Your journey may be affected by ASLEF’s overtime ban as we’ve had to reduce and amend our timetable as a result, so please be sure to check before you travel.

If your train’s been cancelled and you no longer wish to travel, you can claim a full, fee-free refund.

Alternatively, tickets dated between Friday 05 April and Monday 08 April can be used any time from Thursday 04 April up until Wednesday 10 April. You don’t need to make any changes to your ticket in order to travel flexibly – our onboard and station teams will be ready to accept your existing tickets.

We’re disappointed with this industrial action, and we are sorry for the inconvenience it will cause.

We’re disappointed with this industrial action, and we are sorry for the inconvenience it will cause.

Kind regards,
Avanti West Coast

I therefore arrived early for my train to avoid any delays but was told I could not board the 9:02. I therefore spent 1 hour at Euston. The email clearly states I could travel
On any train.