Re: Change of auditor
Welcome to the forum. 
It's very wordy and in BrE would be considered overly obsequious. I would write something like this (bearing in mind I have no idea what "XXX Sdn Bhd" means).
Dear [Mr/Miss/Ms + surname of recipient]
Re: XXX Sdn Bhd
Please note that we would like to request a change of auditor for the above project/building. Please arrange for the current auditor to remove himself/herself as soon as possible, and send us written confirmation.
Yours sincerely
[Your name]
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.