What should you do if someone you have never heard of sent long distance charges to your Verizon account and you believe it is a scam?

Contact Verizon and tell them you have noticed some unauthorized charges on your account. If they won't help you, first try to talk to a supervisor. If the supervisor won't help you, contact the credit-card company that you use to pay your Verizon bill and tell them about the fraudulent charges. Credit-card companies have numerous protections against fraudulent charges, so they should help you. Lastly, you may want to check your credit report (you can get free copies from annualcreditreport.com) to see whether anyone has opened fraudulent accounts in your name elsewhere.