Please note that forum postings are not directed at any person in particular - you're posting to a public board.
Given your question, you may want to submit a Support Request (go through the Support section of the site).
I do own 105 kudoz points and 2000 browniz.
KudoZ aren't relevant to upgrades - only BrowniZ.
as you offered me to become platinum with only 90 usd/euro, could I use the said points for that? Thanks in advanve
Whatever the offer said... I cannot check myself, as (i) I'm Plat already and (ii) I donated my BrowniZ to team members, so the options aren't displayed.
If you go to the Go Platinum/Review page, you should see the options available to you.