[Selmavw]

Have you or anyone done chargeback on Amazon and does it 100% work if it’s your first time

Nothing Is 100% guaranteed.

Be It your first time or tenth time, makes no difference - every claim Is assessed on a case-by-case basis.

So like now Amazon told me to file police report what if I was to wait a week and ask for a refund will they still say file the report

Their system is not suddently going to forget that a PR was requested for your claim.
Although some smaller companies can tend to mess up with their records, a comapny like Amazon that has been hit by SE'ers many many times is for sure keeping their records.