If you re having second thoughts, the sooner that you cancel the better. However, £2,200 isn’t a huge AP in the current climate, so if you cancel you may be wise to wait the full 2 years (or most of it) before you re-order. AP’s are likely to be high until the chip shortage eases, which is unlikely to be before next year. Cancelling now and reordering next quarter may at best achieve nothing and at worst could cost you more.
What have you ordered? Maybe those with knowledge of the car could reassure you?