[ajb]

The best guide for dealing with obstructive bureaucracies is patio11's :https://www.kalzumeus.com/2017/09/09/identity-theft-credit-r...

That's specific to credit theft, but a great many of the principles apply to many situations:

- Approach via the legal dept, since their objective is to remove risk, rather than close tickets.

- Know your rights under the law

- Act like a relentless professional not an angry amateur .

But read the article, it's worth it

[jalapenos]

This, just calmly explain to them your awareness of the asymmetrical costs you can inflict on them (which GDPR etc were specifically designed to create) and what you'll be doing next on what date. And then make sure you do it.

I've found quoting exact provisions of statutes to be very effective (just be careful to be right).