WORST SERVICE IN HISTORY

I have been trying to upgrade my contract since January. I have spoken to many *********** sales people who have promised me call backs, email backs but almost 2 months have gone by now and still nothing. I am a loyal and paying customer for over 10 years now and I am just utterly disgusted and appalled at the terrible disgusting service I have received. Should this not be resolved in the coming days I will be moving all of my business 4-5 lines elsewhere. This is ****ed company and this is not how you deal with customer such as myself.