YES, I have faced horror experience with online exam even if you will read your question a bit loud - Mr. Proctor will say => who is there with you in room; If you will use tissue, proctor will say - is that handkerchief, you are not allowed; If you will just roll up your hand & by chance it comes in front of camera for 1 sec - Mr Proctor will say - why are you covering camera -- AND HE WILL CLOSE YOUR EXAM RIGHT THERE without giving you a single chance of listening to you and he won't call as they claim, he will leave a message on chat window & will revoke your exam..
Online exams are just exploiting's common masses & looting there money AND they won't refund nor they will reschedule, you are OVER... Take care