Facetime using wrong number on MacBook

As often in the new year, I change phone carrier to get a better price plan. I always keep the same number of course, but for a short period of time, as the "phone number transfer" isn't instantaneous, my usual phone number isn't active, and I have to use a temporary one.

This time, the transfer between temp and old phone number hasn't been smooth: Facetime, on my Mac, is stuck with the temp phone number, and I do not know how to change it.

On my iPhone, everything is set with my old number, including Facetime and iMessages.

On my Mac, iMessage uses the right phone number... but not Facetime.

I turned it on and off, but it keeps on using the wrong phone number to dial (which doesn't work, since the number isn't active anymore).

Any suggestion?

J