How to make a request for refund from the home office

Hi

I submitted British citizenship registration for my two children but I mistakenly submitted the wrong application for one of them. I was meant to use MN1 form for two of them but didnt realised I choosed the wrong one (Nationality Form T) for one in which I am suppose to and I didnt realised this until I have made payment and printed copy of the form.

My question how do I apply for a refund because this happened yesterday and I have not sent any documents over to the home office.


Thank you for your time,

Many thanks