Who I have the same questioned this topic

I recently left my phone at a park, and when I went back it was gone.  It has been several days and no one has turned it in, so I believe someone has kept it and is planning to use it.  I transferred my phone number to a temporary phone.  I would like to lock it and mark it as stolen/lost.  I have tried going through 611 but it will only let me lock my current phone number.

Is there a customer service rep that will help walk me through how to lock the phone and put it on the stolen/lost list?  I have the phones ID number.