How to start a new global account if I can't access my old Chinese one?

Greetings!

I can’t update my ClashRoyale because I downloaded CR in China and the
Chinese server has separated from the global server. I have no intention to
keep playing the old Chinese account, I would like to start a new one.

However, Every time I open CR it requires an update, but when I go to the
AppStore it says " App not available in your country". I can not get into
the app. Is there anyway to do it without having to factory re-set your
iPhone?