It's one of those extended car warranty scams.

Continue calling after I have told them I have sold my car, what makes me mad is the lack of manners,as  they hang up on me, several times,  I called back and ask them why they hang up,she said ,because you are not interesting! And they hang up after I tried to confronted of them several times about their rudeness,Really? Then they block my phone,after I told them I was a Lawyer, and I will expose them! Their number is 864, a.c. area code by the way,but 864- 999,3097