I tried so many things to get that enterprise service working, but it doesn't. The enterprise service needs to be reviewed by SAP. Who can I contact?

If you are having problems consuming an enterprise service or you feel like there is something wrong with a particular enterprise service on ES Workplace, report it. Create a CSN ticket on the respective application component hierarchy (ACH). Please make sure you use "eSOA:" as a prefix in the subject field. You can find the related ACH in the technical details section for each enterprise service on the browsing pages of the ES Workplace.