The number 855-233-7309 is SCAM. These individuals use many domain names such as:
emailphonenumber.com
forgotmygmailpassword.com
... and many others. These two domain names are already confiscated by ICANN however in many cases they use their phone number on other web sites such as LinkedIn.com.
Here is list of over 3,300 web pages at LinkedIn where they attempt to defraud people believe they are Google, Inc., Microsoft, Symantec, Apple and countless others.
https://www.google.com/#q=site:linkedin.com+855-233-7309&start=0
This group which is based in India will ask for email passwords, credit card information and sensitive information in an effort to commit fraud and other illegal activities. You should never call these individuals nor should you ever provide your passwords to anyone. They use phishing tactics by impersonating legitimate companies. The FBI has also been notified. Believe it or not, they even try to pose as the FBI themselves.
Be careful.