my handy payment

hallo, i received an email that O2 sent a document related with the phone bought in terms of payment … I am out of the country and dont understand what is that even i did not receive the document. ı checked my bills but i can not see the bills of the phone as well. wher can i get detailed information? Many thanks 
Edit o2_Bianca 16.12.23 08:36Uhr: Moved from o2 My Handy & Finanzierung to English o2 Community mobile.