Do you understand what you are undertaking?
You don't apply to do an apprenticeship in the RAF; you apply for a particular role and you earn an apprenticeship by completing specialist and on-the-job training. You will be committed to doing this job for a certain number of years, so make sure if is something you want to do; don't go swapping between jobs to get in quicker because your application could be delayed or stopped at any stage, from DAA to interview to medical etc.
There's a 'Contact us' option on the website with email, phone and chat options.