I have been using two O2 mobile connections for the last two years. Recently, the contract for one SIM ended, and I canceled it. However, my other SIM is now being billed double the actual tariff amount.
Edit o2_Cora 15.07.24: Post moved from → O₂ Mobilfunk: Vertrag & Tarife
Probably because you had a discount for having two contracts. It is not being billed double, it was previously being billed at 50%.
No, I didn't have a discount. I took the second SIM after one year.
Hello 
Welcome to our community. Nice that you have found your way here.
As bs0 has already pointed out, you probably had a combination benefit of 50% with your second contract, which has now been canceled because the first contract was terminated.
Please take a look at your mobile phone bill from the previous months, is there a combination benefit listed there as a discount?
Best regards
Kathi
Hello
can we support you further from here or have you received all the information you need in the meantime?
Please give us feedback here 
Kind regards, Kathi 
Good morning
I assume that you no longer need any support at the moment.
Feel free to contact me again here if you have any questions 
Best regards, Kathi
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.