DSL-Verbindung vor 2 Tagen deaktiviert

Hello O2 Team,
I am a new DSL subscriber. When setting up my account I had filled out the SEPA Direct Debit car form, and on my bank statement, I see that my phone bill Telefonica GmbH contained a debit for my last monthly bill. However, my DSL connection has been disabled 2 days, and when I spoke to customer service, they said that this was because the SEPA direct debit did not work.

This is strange because my bank confirmed the strain.

Can someone help?

Prost, Harry.