I'm 100% positive my login details are correct (I have successfully changed the numeric password and verified it along with my billing number through 800 770 077) and yet when I try to log into My Vodafone, it eiter says wrong combination of password/login, or starts loading and hangs on loading screen (vodafone logo) OR the login button just changes to WORKING then changes back to LOG IN immediately without an error. 

Can anyone tell me, how to get this terrible dumpster fire called My Vodafone  to work? 

Thx in advance, Veo

Hi,
you'll need to contact Vodafone directly to have them look at your account. 

@Vojtěch OchmánekHello, please contact us via pece@vodafone.cz and we will help you. Please be sure to include the phone number you use with our company and the first and fourth digits of your My Vodafone self-service admin password. Please also attach a screenshot of the My Vodafone login screen.