You need damages to sue. There are no damages in these facts. Write a complaint to the store manager, regional manager, and email any executives whose emails you can find online.
I'm sorry to hear about what they did to you. However, unfortunately, it does not sound like you have any grounds for a lawsuit against the store. (Most importantly, what were your damages as a result of this incident?)
Ms. Berjis is licensed to practice law in the State of California. The laws of your jurisdiction may differ and thus this answer is for informational and educational purposes only and is not to be considered as legal advice. Since all facts are not addressed in the question, this answer could change depending on other significant and important facts. This answer in no way constitutes an attorney-client relationship.
There is no suit you can win here.
J Charles Ferrari Eng & Nishimura 213.622.2255 The statement above is general in nature and does not constitute legal advice, as not all the facts are known. You should retain an attorney to review all the facts specific to your case in order to receive advise specific to your case. The statement above does not create an attorney/client relationship. Answers on Avvo can only be general ones, as specific answers would require knowledge of all the facts. As such, they may or may not apply to the question.