You should complain in writing or verbally to the insurer's internal dispute resolution section if you think the information requested is excessive or irrelevant. (insurancelaw.org.au)
You should receive an acknowledgement letter from the adviser's internal dispute resolution system within 14 days. (moneysmart.gov.au)
If you are not happy with how they handle your complaint, you can ask for it to be reviewed by MTA Insurance's internal dispute resolution team. (moneysmart.gov.au)