I am sorry it could be some error on the Microsoft website while booking in such case as the issue is on there website as scheduling is done there I would request you to wait for sometime or we have teams over call who can book exam on your behalf also please contact the teams as they will book it for you.
Office hours
9:00–18:00 CET (8:00–17:00 GMT) Monday–Friday; closed on local holidays.
Telephone numbers
Language Country Number
English General +44-161-855-7455 (toll)
Pearson