SEEK doesn’t play any role in the recruitment process other than to connect job seekers with advertisers. When you apply for a job on the SEEK site your application is sent directly to the advertiser. For this reason, you will need to contact the advertiser directly to withdraw your application.
If I apply for a job and then remove it from Applied jobs, does it delete my application?
Information found in the Applied jobs summary of your SEEK Profile is only a record of the information that was submitted. If you remove a job from this summary, it won't remove the application from the advertiser's records.