A method including: receiving a chargeback message from a processor (or offering the service to tenants who can submit chargeback details over APIs), selecting from a database data configuration parameters corresponding to the processor; receiving a first data file via a graphical user interface, wherein the first data file includes evidence responsive to the chargeback message; converting the first data file from a first format to a second format according to the data configuration parameters; after converting the first data file, generating a representment data structure that includes the first data file in the second format; and transmitting the representment data structure to the processor.