PS5 Pro Layby Question

With the news that Sony are jacking the prices up on PS’ this week, I went and put a deposit down to layby a PS5 Pro. It was a spur of the moment thing because I was at the shops, and I’d want to trade in my PS5 towards the purchase - which I didn’t have at the time. Plus an extra week to get some shit together would be helpful.

I did ask the chick at the counter if the layby\deposit locks me in at that price even if there’s a price rise. She said “yes” but she didn’t sound extremely confident. So I’m just here to double check if there’s any employees or managers who can confirm.