Orders / Call Offs

How can I call off material?
How can I find out if my order is being processed?
Can I have orders delivered to a different delivery address?
How can I complain about a delivery?
There were problems with my order, what can I do?
Will I receive a confirmation for my call offs?
How do I request a follow up contract?
Where can I find an overview of my call offs?
Which documents are available online?