Hello.  My German is bad. Sorry for this in English.  

I have cancelled my contract for internet and landline last April.  I got a confirmation email that my contract would be terminated at the end of May 2023.   The last payment should have been for May 2023 however now I see that I have still and active contract that will go until May 2024 !!  What is happening ?  I have already left Germany and returned the router,  I no longer live at the address.   I have the email confirmations that I cancelled already.    Please sort this out and return the money that was taken from my account for June 2023.