It is usual that we require 2-3 months prepay for foreign customers at dedicated servers (especially from eastern europe and asia) - We dont think this is unreasonable or wrong.
We actually delivered the Server to you BEFORE you paid.
The offer we sent you was for the 10 Servers you requested (55EUR / server), not a new price for your actual server.
I fail to see what we should have done wrong here.
The Invoice you got now is the first month, and the next month (as we always book on the beginning of the term, so we did that to get into this cycle.).
That is why you got the first invoice for 2 months - every following invoice will be for a single month.
We even did not require prepayment from you for this server, so i say we did nothing wrong.