Possible scam

Beginning of April I received a modem kit with my address but a different unknown name. I still have it because I haven’t had a chance to return it. Then earlier this week I get a letter in the mail. Again, correct address, unknown name. It’s a different name than the name that was on the modem. Today I got another bill. This name matches the same name on the modem box I got in April. What is going on? Is this identity theft? Has anyone dealt with this? Also Xfinity canceled my service and I had to sign up all over again and even got a credit check! Absolutely ridiculous. Can someone please tell me if this is a scam?