If that is true, you should be able to give us the information at the top of the summons, since it is now "public information".
Give us the court name and location, the name of the judge, the plaintiff's attorney's name and Bar number, and the name of the company or person that is suing you, the date you are supposed to appear, and possibly a docket number.
Can you do that, to prove your statement?
I betcha you can't. You didn't even give the physical and web address of the company that uses this phone number, so we could check their validity.
Do not bother to return and argue these points, unless you can provide the data I requested.