If in fact you know it was comprised by theft of a purse or other personal item, as suggested by someone here, check your homeowners insurance carrier. Many policies now have identity theft coverage that provide you with a number to call for expert advise regarding these type issues. It will not be a claim and has no deductible. It’s just a business your company contracts with to support you with these type issues. If it was a call as also suggested your phone may have a option to not ring if the number is not recognized in your contacts. Then they must leave a VM. Anyone that needs to talk to you will leave VM. If you answer the phone for these type calls you are going to get an increased volume of them as others have pointed out.