In order to change over to Shoutcast this would mean having to delete your current Icecast account and then manually recreating it as a Shoutcast server instead. Unfortunately there is no simple way of changing the server type once the account has been created as a certain server type.
This would also mean that we would need to assign a new port number to your account, so you would need to update the stream url with any directories that you may currently be listed with. This would also mean some small amount of downtime whilst we get this all set up and back up and copy over any files that you may have uploaded.
So if this is all ok with you, then please drop us an email via https://www.internet-radio.com/contact/ with your accounts username and we shall get this set up for you. Thanks.