Issue with billed amounts for my contract

What exactly does your invoice say, specifically on page 2? There you can see what the costs were for. Reversing the direct debits wasn't a good idea; now you're in arrears.

I don’t have an invoice. I only signed the contract and haven’t received any bill from you. I could see the amount that was supposed to be charged on December 15th, and that date hasn’t arrived yet, so I’m not overdue.

I’m not going to pay an amount when I don’t even know what it refers to. My contract is clearly active and states a monthly payment of €19.99.

You can find the invoices in the customer portal; to do this, you should first register your phone number for Mein o2.

I already tried to register and I wasn’t able to do it. I also tried calling, and every time I finally reach someone, the call gets disconnected.

Honestly, I’m quite dissatisfied with your customer service.

That's not my customer service.

What exactly isn't working when you try to register your phone number?

Hi ​@Lulu071215 

welcome to our community. Pleasure to meet you. 🙂

As you are not connected with your contract to our community we are unable to assist you here. 

So please use our contact form to clarify the extra costs. 

Thanks to Bumer for assistance.

Greetings

Manga

I’m not going to pay an amount when I don’t even know what it refers to. My contract is clearly active and states a monthly payment of €19.99.

That is just the monthly charge for the contract. There are several reasons why the amount can be higher - in the first month 40 Euros connection charge, for example, then there are calls to other countries, calls to non-geographic numbers, subscriptions, using your mobile contract to pay for things. Just because you cannot register doesn’t mean you simply don’t pay. You clarify the situation first or ask to have the invoce posted to you.