Unfortunately, booking a pickup with DHL only works one time with one return request. If DHL did not arrive at the scheduled time you will need to submit a new return request in order to book a new pickup appointment. You can create a new return request by logging into your account at remarkable.12return.com. You will need to print new shipping labels now, as the previous shipping labels have expired.
* To avoid going through the process all over again you can drop the package off at one of DHL's offices along with the three copies of the proforma invoice and the second part of the shipping label.