You skip the month by logging into your account the 1st-5th of the month- no call needed.
You can process exchanges or returns on the website or by live chat- no call needed.
If you want to cancel, you must call. As long as its not the beginning of the month when call volume is very high, you shouldn't have to wait very long at all. I never have a problem getting through and I have been a member since 2010.