I've copied below the email reply received from Argos today.
They make it sound like we've been using the bed for the last year and have only just noticed.
It is still in the box !
From reading the Consumer Rights Act 2015 I think I am covered by the fact that they have breached their contact as the goods do not match the description and their liability is for 6 years.
Am I reading this correctly before I make an idiot of myself ?
Thanks in advance
Thank you for your email regarding your order,
Had this been made known to us within the first 30 days of arrival, we would have been able to offer further options.
However as previously advised, due to the age of the item we are unable to help you with this.
I do apologise for any inconvenience caused.