I added an update about my experience here: https://www.canadavisa.com/canada-immigration-discussion-board/threads/rescheduling-oath-ceremony.740240/post-9866000My citizenship ceremony was on august 3 2021
I send an email to reschedule on august 2, 2021
I have been waiting till today no one getting back to me again.
I am wondering to know how long will take to getting me back
Maybe you should email or call them again.