Passport issue

I have my CIE exam in 12 days almost and they have asked me to bring my passport when i come to take the papers. I have a problem that in my statement of entry my name is Mohammad Shoaib but on my passport its Muhammad Shoaib (o is replaced with u).

So is there any way to get my name changed on passport within 12 days and as my other nadra doccuments contain the same spelling as my passport (Muhammad). Can anyone help me out plz i am in a lot trouble and tension

Inform the exam authority As soon as possible atleast a week before your paper. If it's possible take all your documents with you to prove your identity, if they agree get it in writing and signed by examination authority