Seems like maybe a good idea for a class action lawsuit? I'm not sure what to do about that. A company shouldn't be able to do this and still meet compliance obligations.
I'll have to delete my account, unfortunately.
edit:
1. I didn't give Paypal my phone number so that they could use it for this. I gave it to them for banking purposes only. I wonder if this constitutes a GDPR violation?
2. I wonder if contacting their auditors would do anything.
3. Maybe email some of the politicians who care about this stuff - Ron Wyden, Elizabeth Warren?