Here is the update as promised.
First of all, I would like to thank @Justin and @Earl Smith. I contacted Parcelforce and they mentioned that they would update the correct address details in their system. But just as Earl mentioned, Parcelforce doesn't operate in Germany, but use GLS or another carrier. In my case it was GLS, so I contacted them as well, to make sure that everything would be updated correctly in the system.
Some moments ago, I received my parcels, so it's great that everything turned out well with the shipping.
On a side note, I got a response from Coralgraph that they would contact Parcelforce so the correct address would be added to the delivery. So got an answer on the other end.
Went through everything quickly, discovered a faulty mug element. Have sent pictures over and reported it. Hope it will get sorted.
Finally, once again thank you all who contributed in this thread. :)