send the SEPA mandate using the contact form.

https://www.o2online.de/service/kontaktformular/

Yeah… I mean that is what I have been doing since July but thank you for your advice Thelma. 

to the contact form or by post?

I have used a mandate form (as the same as you have attached) by post and I have sent it as a pdf to their email address 

Since there is no email address for customer service and letters to Nuremberg tend to get lost, it should now be done quickly using the contact form.

Tend to get lost…. Wow. 
 

Thanks for your help, have a good day. 

I’m just going to stick with receiving reminders and then me replying with proof of payments. My letters apparently get lost and my IBAN that begins with DE doesn’t register online. 
 

Have you tried using the o2 app?

Yes. I’m going to go to my nearest store tomorrow and ask them to have a look and if there’s problems they can put a note on my account.

Thanks for your good advice! 

Hello @Sj1987,

welcome to our o2 Community 

Have you also already tried to update your bank details after logging in via a different web browser into your customer account or erasing cookies  and cache by your usual one?

That reads as quite a struggle for you to change your bank details, a German account number starting with DE should register via your customner account.

Is the owner of the bank account the same with the old as with the new account?

Best Regards,

Gerrit

Thanks Gerrit. Yeah, I have used my phone, my laptop and my work computer, I’ve used a few browsers and none work. The app confirms an update in details and says the update may take a few days but this has been the case since July which is the reason I sent the letters/mandates/forms but according to (possibly your colleague??) mail tends to get lost. I’m unsure if that’s the postal system losing the mail or whether o2 “lose” the mail which is concerning given there is private information. 

@Sj1987 I could take a look and see that your letter from this month has arrived with us and the colleagues are going to process your request to change your bank details.

Regards,

Gerrit

Hello @Sj1987  Did everything work out for you with the change of bank details or is there anything else we can do?
Kind regards, Kathi