Of course not...........................................................................

Miranda rights are not required. A myth from too many TV shows.

So far every court that has addressed the issue has said yes.

Maybe. But as long as they had a reasonable belief that you had stolen they are allowed to call the cops. The fact that you were arrested would...

No it isn't. And in the time you took to ask that you could have been doing homework.

IMO you do not have grounds to sue or anything. Bad customer service does not give rise to a lawsuit.

While you can certainly discuss this with your lawyer I don't see a conflict here.

Only a judge can really decide this but, based on the facts you presented, it sounds like he agreed to pay her back.

Seems like an awful lot of trouble for a couple of dollars. Just request a refund.

While you can, and should, refuse to speak with him without a lawyer, you can't stop him from contacting you or investigating.