Refund request for accidental O2 Music Paket subscription

Hello O2 Team, On my latest bill for mobile number xxx, I was charged 17.96 EUR for a third-party subscription called "O2 Music Paket". I never intentionally signed up for this service; it was activated accidentally. I have already cancelled the subscription and activated the Drittanbietersperre (third-party block) on my account to prevent this from happening again. Since I did not use this service, could you please issue a goodwill refund (Kulanzgutschrift) of 17.96 EUR to my account? And also note in the second last invoice , it was also included . Kindly check last 2 times invoice and kindly refund the remaining amount to my account Thank you for your help. Best regards, Arijeet Paramanik

edit o2_Manga: Rufnummer entfernt; 17.08.2026