Hi Robert
there are already some threads for Bank Statements. Please e.g. refer to https://scn.sap.com/thread/3768235, which describes this.
You need to check, if your bank's format is one of the internation or national once supported by ByDesign. If not then you can go for implementing an own mapping using the ByDesign Developer SDK (PDI).
Another option could be that you select a partner, that does the mapping from your format to one of the SAP predelivered formats
Please let me know, if you need more details,
Best regards and thanks
Marlene