Returned equipment

I returned 4 home security cameras April 25th. I have been dealing with this since then and now I’m being charged $385.00 for all 4 but they were returned. The store manager did not help me and told me she’d reach out yesterday and didn’t. Customer service agents have not helped. A supervisor will not help. Who do I need to speak with? Customer service won’t help me. The store won’t take accountability for not returning the cameras and not updating my account. Whatever happened there. Who do I contact? 4 months of this and all I get is push back and no help. I’ll find another company and keep fighting these charges.