You can't ask them for advice either. They'll tell you that they're there for enforcement.
"The lower level of fine, up to €10 million or 2% of the company’s global annual turnover..."
That could crush smaller companies, but for large companies it's a slap on the wrist.
This is straight from Article 83 of GDPR: "Infringements of the following provisions shall, in accordance with paragraph 2, be subject to administrative fines up to 10 000 000 EUR, or in the case of an undertaking, up to 2 % of the total worldwide annual turnover of the preceding financial year, whichever is higher"
Moreover the next fee level is: "20 000 000 EUR, or in the case of an undertaking, up to 4 % of the total worldwide annual turnover"