Have you searched their domain? Their website says that they have been in business 9 years, but a domain search indicates the site is barely 5 months old. That on it's own is 99% proof they are a scam.
state: REGISTERED, DELEGATED, VERIFIED
org: Baltic Oil Terminal
Last updated on 2018-01-25T12:21:30Z
Now go to Rotterdam Ports site. This company is not even listed. Looks like a scam.