O2 DSL Relocation to Munich

Hello,
I currently have a DSL contract in Berlin, and would be relocating to Munich due to unplanned circumstance in October 2019.
I am interested now in transferring or taking my DSL contract to Munich , I was suggested to login to my account and then request for the transfer.
Unfortunately when I click onto relevant tab in my O2 page , I am redirected to the home page.
https://hilfe.o2online.de/ and am not able to place a transfer request.

So could you please let know how can I request for the transfer of the connection.

thanks and best regards!!!
Satish Kumar