The amount on the letter does not match the actual claim.
You can find all the information in your personal area under "Claim". Via the download, you can see every single entry in the detailed list of receivable items.
If this information is not sufficient for you to fully resolve the matter, you can describe your request to us in the "Messages" section and upload all the documents necessary for verification using the upload function.
Or call us and we will clarify everything directly in a personal conversation. You can find the telephone number online in the logged-in area on the left or on our letter. Please have your reference number and all relevant information on this case ready.