prepare for 38c3, adapt mail and delivery times

content/congress_hamburg.md

@@ -22,9 +22,9 @@ For important topics and requests our ticket system is the preferred contact poi
 
 |               |              | 
 |---------------|--------------|
-|Ticketsystem:  | {{< spamspan 37c3-logistik cccv.de >}}|
+|Ticketsystem:  | {{< spamspan 38c3-logistik cccv.de >}}|
 |Rocket.Chat:   | #logistik    |
-|On-Site Phone: | 0341-39294864|
+|On-Site Phone: |  |
 |DECT:          | 1010         |
 
 ## Shipping to Congress
@@ -32,7 +32,7 @@ It is possible to have parcels and other deliveries sent to congress. Please be
 
 {{< note >}}We can not provide postal services to visitors. Please use post boxes nearby.{{< /note >}}
 
-{{< warning >}}Do not ship items arriving __before 18th December or after 4th January__!{{< /warning >}}
+{{< warning >}}Do not ship items arriving __before 18th December or after 3th January__!{{< /warning >}}
 
 The shipping address for the Congress Center Hamburg is: