I am/have been a Vodafone, MyFone and Unitymedia customer and I have promised myself that I will never by any Vodafone or related product due to bad customer service for English speakers.
I have had so much issues while I was switching from myfone to unitymedia, I got no valueble support from either of them. I eventually lost money due the mistake made by the vodafone salesman.
overall experience is bad, and I am activly reaching out other expacts in Germany who are not German speakers to advice them regarding your poor english language support.