I have contacted OceanEx numerous times, but they just keep telling me they are updating my ticket and prime trust hasn't replied yet. I've asked them if they can call Prime Trust, since after 6 ticket updates they are not replying, and they told me last they are not allowed to call prime trust on the phone!?.
While this is not an excuse low-level customer support might indeed not be able or outright be banned for making any inquiries to 3rd party without clearance from a supervisor, so probably the guy told you the truth.
But he should have already escalated the ticket to a higher-up after that many updates and days passed.
Now the only thing left for you would be indeed to call Prime Trust and ask them for information on what is happening here and why and hope they do offer support to customers, there are some who will not deal with private persons serviced by their partners. Unfortunately, there is simply no other solution for you now, and no way anybody on the forum can help you with it.
Honestly, it's my first time hearing about OceanEx. Maybe next time you should avoid such shitty and less popular exchanges that don't care about their customers.
They deal with coins on the Vechain, they also hold IEOs so there is a possibility some users are trapped on it because of the project they've invested in it.