Moving a phone from one room to another

I had a phone installed a year or more ago, at the time there was no charge to add this service, but when I contacted COX today, they informed me that they would charge $50.00 to move the phone from the room it is in now to another in the same house, same wiring, same TV, same internet...etc. What is so difficult about unscrewing a coax wire and screwing it into another room  but for some reason, COX won't provide any service without charging ridiculous fees. It's literally a 5-10 minute job and I've managed to just get a coax extension, drill a hole and move it to the next room while it's still connected to the same outlet. The reasoning behind all these charges for doing something so simple is just another reason that COX is becoming the worst provider I've ever used. It's nothing but greed and the two words "Customer Service" don't exist at this company. Good luck to all who stay with this rip-off company. New Years resolution is to change providers ASAP.