partner miles on an upgrade

I'm in the middle of a disagreement about TPs and miles I thought I should have earned on a US airways flight. I upgraded a PHX-EWR ticket to first class the day before the flight but have been told this doesn't qualify for first class TPs or miles because......
"After verifying your claim for the flight (Phoenix - Newark) dated 28th May 11, with US Airways, they have advised us that the class which you purchased was G class only, which is Economy cabin and their records show that at the time of check in you upgraded your seat for a nominal fee to O class; which is in their First Class cabin. However, your fare was not changed and your ticket remained as an Economy cabin ticket. So in this case you will earn miles for Economy cabin rather than the Upper Class cabin."
I couldn't find T&Cs for this online but is there any way I can argue this. I flew in First Class, I wasn't aware that some first class travel doesn't count. I don't know if its worthwile since they'll probably ignore this. But one reason I upgraded was to earn an extra TP and get me to FC Gold.
Anyone able to explain this so I understand it?
Thanks ?|
"After verifying your claim for the flight (Phoenix - Newark) dated 28th May 11, with US Airways, they have advised us that the class which you purchased was G class only, which is Economy cabin and their records show that at the time of check in you upgraded your seat for a nominal fee to O class; which is in their First Class cabin. However, your fare was not changed and your ticket remained as an Economy cabin ticket. So in this case you will earn miles for Economy cabin rather than the Upper Class cabin."
I couldn't find T&Cs for this online but is there any way I can argue this. I flew in First Class, I wasn't aware that some first class travel doesn't count. I don't know if its worthwile since they'll probably ignore this. But one reason I upgraded was to earn an extra TP and get me to FC Gold.
Anyone able to explain this so I understand it?
Thanks ?|