additional charge of £63.00

Hi All,

I have paid £1900 for an appointment on 15th March, before the fees went up. Since then I have changed my appointment waiting for HMRC to update their records.

Now I have my appointment on 16th May.

1. Will I be charged extra £475 on the day?
2. I read some gurus have said I dont have to pay extra, but is it still valid of I keep on delaying my appointment?
3. I tried booking a new appointment with a different email ID, the new fees for that is £2375, but even if I pick an appointment with an additional charge of £63, the Word Pay payment system only asks me for £2375. So when do I have to pay the additional £63?

Cheers