Define date pension payment is to be taken

Staffology can treat the NEST pension payment schedule as automatically approved for payment, which saves logging on to NEST but you can't define the payment date so NEST start to immediately process the direct debit. I want the NEST direct debit to be taken on the date that has been agreed and I should be able to set-up the payment date on Staffolgy. I would rather logon to NEST and manually finish the job correctly than allow NEST to take the money immediately