Originally Posted by Happy

Unfortunately the difficulty to be able to upgrade with points is increased exponentially once the OC is converted to NC - not only the chart used would be the new chart, therefore much more expensive, but the T&Cs of the NC explicitly prohibit all the flexibility associated with the old chart.

Try the UK number (in the wiki) if you haven't, and see if you have better luck with the UK office which has been much friendlier to deal with and more knowledgeable/efficient per the DPs reported here from Day One of this mess.