Ah, that is a problem then.
The answer is no. That is because I assume the £29k extras were just added to the house price.
The options contract is quite clear.
It says at 2.6 that orders can not be cancelled once products have been ordered, put into manufacture, delivered on-site or installed.
This is the case. Sadly I think for the options you would lose the £29k in relation to that.
They are a separate contract (even if included in the price).
I don't think they are likely to charge you, as they could charge a new buyer, but in theory, they could.
But if they did and sold the property, any extra would be offset against that £29k.
Can I clarify anything for you about this today, please?
If not, I would appreciate a 5-star rating for my answer. If you need anything further I am available for a follow up at no extra cost.