Changing calendar is not working

Hi,

I change the calendar from @altapay.com to @gmail.com

Every time I do so, the UI shows the new calendar.

But when I go the the actual day to see my tasks and calendar events, I still see the old one.

After some time, if I go back to calendars, I see again the old calendar rather than the new one:

I already went to outlook to remove the permission for accessing estebanm@altapay.com from Rize.