How Do I Convert My Minutes And Number To A Deactivated Verizon Phone?

I've made multiple calls and emails to Straight Talk addressing my problem with my current phone but to no avail. Since I have not been provided assistance, I would like to fix the problem myself by converting my minutes and phone number on to an old Verizon phone. This Verizon cell is no longer on a plan, but the lady I spoke to from Straight Talk insisted I go to Verizon to get it unactivated. I need to know how to switch my current phone to this one without all the troublesome phone calls.