Invalid data provided error when exporting customer payments through API

Invalid data provided error when exporting customer payments through API

SInce the last few days some of our customer payments are failing with "Invalid Data provided" which I havent seen before. Some of these payments go through on retry but some havent. I am supplying all the mandatory fields and that has been verified by your support staff by email. I just found out that customer payment addition on the website has also started failing with the same error. We have changed nothing on our end. This is severely affecting our business.
  I have not been getting satisfactory answers from your support team. Please escalate this issue.

Thanks
Avinash