I just wanted to bump this thread because I too have been scammed by the 1and1 billing process.
I've cancelled all of the domain packages I ever had with them, being sure to "Confirm" via their emails. The debit card I had on file with them expired and I'm still getting invoices for domains I cancelled years ago!!!
I've even gotten debt collection letters in the mail for domains I've cancelled. This company should be shut down. They are a bunch of crooks!!!
-Scott