As long as you can store a set of tyres in a garage/shed, swap the fronts for CC2 next month but store the existing fronts. When the weather warms up, swap them onto the back and get new PS4's for the front, store the CC2's to next winter?The original ones. Whatever was fitted to 2019 18" wheels. I could go outside and look, but it's raining.
Everyone is lambasting you for not being a tyre expert or wanting to drop £1k on a set of tyres when you didn't strictly need to. I think some recognition is due for trying to get some intermediates for yourself. And for many the key to affording a £60k car is the promised lower running costs.
Them that sold them to you probably could have mentioned it might be a bit weird tho.