Somewhere that you should not click through links or call back numbers. The links can contain viruses, or rather, I guess, the page you go to may have a virus. It said with calls, they have it set up to try and keep you on the line (you kept repeating your actions) but I felt what I read meant an actual person would keep you on the line. Anyway, it said the number would charge an outrageous amount per minute on your phone bill.
I do a couple of things. If someone says a charge was made, I go to my account (not through a link) and I check. I have never found anything charged.
I never call back anyone, unless it is someone I know.
Once a scammer called me and said they were with my card company and wanted to confirm I had made a purchase of about $850 on my account. With these, I go one of two ways. I either say I did not, but my lawyer handles all of my financial affairs, so if I could please have your name and number; I will have him contact you. They always hang up! Or, I tell them that is the correct amount. One conversation went this way: yes, I am confirming it is correct. They replied it was such and such an amount. They could not exactly say I did not make the purchase. I confirmed it was correct and I was expecting the package later in the week. They hung up. Then I checked my credit card to make sure it was fake. It was.
Some people do not answer numbers they do not know, but some of us do work with many companies and I never know what independent contractor for them, may be reaching out to me for more information, or to offer me a job. So. I answer everything!
Anyway, you may want to check your phone bill. Also, have you done a reverse lookup to see who the number belongs to?