I get voice messages from these people often. The message is always "... your car's extended warranty. Since we have not gotten a response, we are giving you a final courtesy call before we close out your file".
I have no warranty, and never did. There is no file. And I have blocked them countless times, but either the blocking doesn't work, or they use different numbers each time. They identified at one point as "Automotive Services". There is an Automotive Services in the area, but the number is different, so I don't know if it actually is that company or not.