Data Exchange definition


I have got 2 issues with the data exchange definition:

1.BACS - I have created Data exch. def with the header and details, but when assigning it to the payment method, you can assign header or details, so file does not contain both peaces of the info. Is there is a solution

2. When importing bank statement I got dates in US, but need in UK format and dates as 19 Jan 2020 - how i can convert those to UK format (I have tried Date Formating) and it does not work.

Thank you!