Travel Plan

I have been with Cox for 27 years.  I've had cable, internet and phone service throughout the years.  Two weeks ago my internet bill more than doubled because of an expiring promotion.  I went into the Cox store to drop my service and go to Verizon.  Cox double teamed me with a sales pitch that would offer me a better price, guaranteed no contract, and my bad, I fell for it.  Because my current cell phone did not fall under their promotion I had to buy a new phone, but the promotion would offer me $500 off, but I couldn't buy the phone then and there, it would have to be a payment plan.  So today, I contacted Cox with the online chat to set up the travel plan on my phone as I'm going to be out of the country for a couple weeks, starting next week.  I was told I had to have cox mobile service for 30 days before I could get the travel plan.  Now I'm going to have to pay exorbitant roaming fees because I've had the phone less than 30 days?  That doesn't even make sense! They act as if I'm a new customer with no credit history with the company.  I've been with them for 27 years!  As soon as this phone is paid off, I'm done.  They are a bunch of scam artists!