here is the link if you would like: http://djtpvavz7cfzf.cloudfront.net/safari2877/index.html?p_num=+1-855-823-0128&ec=Unknown&subid=357c9vcfna1x9807
Interesting. Number on popup does not match number in link. I recommend calling both to test.
They want $1500 for a warranty extension and to put a security product on the machine. They claim its due to pornography on the computer. They only want you to use Chrome or Firefox for the remote session, too. Surprise! Go forth and have fun, but do have a “fake” serial number handy, the make and model of the Mac, and also the version of the OS (Find out which macOS your Mac is using - Apple Support)