Very poor service and customer carea

<p>I have been on the phone everyday since monday to do a upgrade on one of my contracts,I have this number on contract with them for more than 17 years.There is appartly a problem on my profile which they promised on tuesday to have resolved in 24 hours.Today they tell me my number does not exist on their system so they can't do the upgrade.I have been transferred from one department to the next and then back for 4 days now without getting my problem resolved.This morning the phone was just dropped on me when I were once again being transferred from one to the other.This is unacceptable customer care,how can I recommend them to anyone if this is the way they treat their clients.</p>