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CorelDRAW Graphics Suite is registered to the previous owner's email address, and I can't register it.
Does anyone know how I can solve this problem? Corel Helpdesk can't help me.
I'm unaware of Corel allowing transfers when buying used, at least for individuals, with the business it had to be transfers within the company. Adobe did when they had perpetual licenses, but had to notify them in order to get the email changed to allow registering with the "new" owner.
Now with "joyful" subscriptions, none of that is a concern.
Purchase your own subscription
do it right ...
Why? They still (at least last I checked) still offered the one time purchase option to "do it right". As long as that is a viable option, I would suggest that compared to a subscription.