It is a long and difficult process in removing/updating the recoveries. As of now, I only know two ways of removing them instantly.
1) Unlocking a locked account
2) Recover as stolen and do not provide the current recovery answers/skip the recovery question section
In order for these two methods to work, the unlock appeal or recover as stolen appeal must be successful. These are the only two instant ways I know of removing recoveries.
Also, if the two methods do not work for you, wait 14 days and remove/update the recovery questions. If you need further assistance, PM me. I can take it step by step, if you do prefer.