Can I claim for something and also change the dates for my trip?

No, you CANNOT do both. Under your policy, if you make a claim, you CANNOT change the period of cover (your travel dates). 

If you need a longer period of cover, you can apply for an extension of the period of cover. An additional fee may apply.

Cover is subject to the policy terms, conditions, limits and exclusions.in the Product Disclosure Statement (PDS).

Read more about making claims: