Premiumservice can be changed to Postal?

[jan39]

Can a booked premium service be changed to postal applying through SET (O)?
Will it cost extra? Procedure?
Similarly as I understand a postal service can be converted to Premium as per this link
https://www.gov.uk/faster-reply-visa-application

[Casa]

If you booked to apply in person at a premium service centre
You can cancel or reschedule your appointment if you booked to apply in person at a premium service centre. Use the link in your payment confirmation email.
You must:
cancel at least 5 working days before your appointment for a full refund
reschedule at least 48 hours before your appointment
You don’t need to pay the fees again if you reschedule your appointment.

https://www.gov.uk/ukvi-premium-service ... ppointment

[jan39]

If you booked to apply in person at a premium service centre
You can cancel or reschedule your appointment if you booked to apply in person at a premium service centre. Use the link in your payment confirmation email.
You must:
cancel at least 5 working days before your appointment for a full refund
reschedule at least 48 hours before your appointment
You don’t need to pay the fees again if you reschedule your appointment.

https://www.gov.uk/ukvi-premium-service ... ppointment

My interpretation of 'booked to apply in person at a premium service centre' means booking made through online for premium service. Is it right?
So if cancel it I can make a postal application instead, will I need to make a new payment with postal application and the one for premium should be refunded automatically?
Thank you

[Casa]

I believe so, yes.