Nexo Secure
I foolishly paid Nexo Secure to add software to my computer to supposedly fix an "IP address" problem. Then realizing that it was likely a scam, I contacted Apple Tech Support who looked at my Mac and didn't think that they did any damage. I changed my Mac password and credit card immediately. They now want $6,000 to continue a "contract". Nexo Secure has a website. Their phone calls are annoying. Nexo Secure has no way to get money from me. I am wondering if anyone else has had dealings with them. I've reported them to the Federal Trade Commission.
MacBook Pro 13″, macOS 12.6