fiserv Payment gateway error

My project is dealing with payment gateway errors on a FIServ platform. Currently I am experiencing data or transaction related errors "the txndatetime and timezone parameters" and need help troubleshooting them. Specifically, I am looking for a freelancer who can provide debugging and resolution services for these errors. The freelancer should be well-versed in configuration and setup, as well as the diagnosis of the source of the error. If you think you have the necessary expertise to help, please apply for my project.