Paying your visa application fee
From 6 February 2012 you must pay your visa application fee online in US dollars by Visa or MasterCard credit or debit card. We cannot accept any other types of credit or debit cards. When your online payment has been taken, you will receive a confirmation email from our payment provider WorldPay. You must submit a printout of this email as proof of payment when you submit your application at the visa application centre.
If you would like to withdraw your application and have your visa fee refunded, please use our refund request form.
If biometric data has been submitted and/or your application has been processed, you are not entitled to a refund either from the UK Border Agency or your card issuer. For more information, please see the Terms and Conditions of Service.
If you have applied for the wrong visa category, you will need to withdraw your application and reapply. Please follow the guidance above to request a refund, and then begin a new application.
http://www.ukba.homeoffice.gov.uk/co...e=UK%20English