You can submit an Acknowledgment of Service within 14+5 days from the date on the N1SDT claim form, giving you an additional 14 days before you have to file a defence. It says this.
Please do NOT start a new thread, as you haven’t.
If you will still be on holiday 28+5 days from the date on the form, you need to find a way of writing and submitting a defence.
Your defence needs to be more specific on why the NtK fails to meet the requirements of PoFA 2012, for example.