It looks as if you didn't carefully read through all of the terms and conditions.
Ebay changed the terms for auto relisting items a while ago - essentially, a skim read will suggest that you can relist auction items up to 8 times for free. However, there is a single sentence exclusion to this showing that this feature is not available to all sellers.
From the link:
https://www.ebay.co.uk/help/selling/listings/creating-managing-listings/relisting-items?id=4147
'Keep in mind that the automatic relist option is only available on listings created by new and occasional sellers. The option will not show for other sellers.'
All sellers can still select 'automatically relist' for buy it now auctions.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)