Contract letter not recieved from Vodafone

[Letter_issues]

Hi, I ordered Vodafone connection through Check24 and it was installed on 28.06.2024. I have not received any contract letter from Vodafone since then (today is 01.06.2024) , but I received the activation code letter BEFORE it was even installed..
I did not receive the contract letter or any letter with the customer no. in it. I can't even contact customer support because they ask for the customer no. which I don't have because it was supposed to be in the letter that never come. 
I need help on what to do now. 

[R4mona]

Hi @Letter_issues,

We are very happy to be there for you.  ❤️ 

In order to provide us with an accurate overview, we need an insight into your customer data. Please be so kind as to contact us via one of these contact options.

Kind regards
R4mona