Very bad non-customer oriented experience.

Very bad non-customer oriented experience.
-Not home message on the bus, but according to the site the package appears to have been delivered 'somewhere'.
-Inquiry from customer service shows that the delivery person has made a mistake, but GLS indicates that, despite knowing that a mistake has been made, it is waiting for the customer to contact customer service himself. One can say, "After all, not every customer is treated personally, they are far too busy for that."
- The contact form gives an error message, so the only contact option is a paid 0900 number (1, - per call), which the customer must then call to correct the GLS error.
-I can file a complaint about this, but according to the employee, this must be done via the ...... contact form (which does not work).
-At one point, the service employee even became rude and agitated that I didn't feel helped.

All in all, a very bad experience in which the customer is absolutely not paramount.