With the provider DWS21, you can cancel your contract by the 20th of the previous month.
If you have a smart card as a medium, you must send it back to DSW21. Otherwise, 10 Euro fees will be charged!
Address: DSW21, 44127 Dortmund
Information from DSW21 in case of termination shortly before the end of the month: If the termination is carried out only a few days before the end of the month, due to procedural reasons, direct debit may still take place for the next month. The amount will then be refunded to you.