Why does this company charge people differently and not offer the same discounts your neighbors received?

I am a "Diamond Member" (whatever that means and whatever benefits it comes with, I did not get an answer). I just hung up from a 2 hour 2 minute phone call that went nowhere. I have my neighbor's bill where she got a 1 Gig internet service for $60 per month (along with $10 discount for paying automatically) so her final bill is $51.05. I called retention to get that price. I was told it is not available to me. The best they could do is 300 mh (less than I have now) at the price she is getting 1 Gig. for I asked that they explain why they cannot offer the same and got a run around. For two hours, no one could tell me why my account of over 10 years is not as important as my neighbor's.  I was told "check back next month".  This blows my mind that we, as customers, are not treated equally. I told them I was not asking for anything my neighbor did not get, I just want to be treated equally. They said they could not do it. I don't buy that. In that two hours +, I spoke to retention, then was sent back to customer service, spoke to a manager that forwarded me back to retention. Am I angry? Yes. But more than that, I am extremely insulted that after 10 years of service, I am being treated like I do not matter as much as someone else. The unfairness is insane. I can't make it make sense. Does anyone think this is the way a business should run? Now, I guess I have to figure out my best option. I did not ask to be treated special, just the same but they could not do it.