Hallo!
I tried to enable as a payment method the BANK TRANSFER , following the documents steps( enable the method, then edit the bank account details and chose to allow users and all others to be able to pay with this method) and though i saved it , it was shown at the order form, but it did not show the payment details- bank account etc. nor in the form somewher nor in the reservation mail . Have I done something wrong?

Hello, you can use tags {PAYMENT} and {PAYMENT_INFO} to show payment details in the e-mail.