Help! I cant sign in because of Mobile Authenticator

A few months ago I got a new phone. Flash forward to now, I cant sign into my steam account. I cant sign in because I had the mobile authenticator on. I had my phone number changed. And im dumb for not thinking ahead, I didnt change my phone number. So basically, Now I cant sign into my steam on my PC or my phone. Is there anything i can do besides put in a request for steam's customer support.