As the Client of the audit it boils down to this; when the auditor or his organization seems to be making up the rules you must ask:
1) Show me within the standard were it is required
2) Show me within the ISO/TC 176 Approved Interpretations Against ISO 9001:2015 were it is required
3) Show me within the ISO/IAF ISO 9001 Auditing Practices Group documents were it is required.
[FONT="]If the auditor insists you simply thank him/her and ask who within his/her organization to address the audit finding appeal in accordance with ISO 17021-1 CB requirements. Draft your formal appeal and send it [FONT="]in[/FONT]. If they do not address your appeal, or appear to be incorrect, you then should go to ANAB and ask for a clarification.[/FONT]