hello. How about just releasing the money on hold?
Here is a lot of complaints. What is the problem on your side?
create a support ticket and tell the number to Dargo here

There a several reasons, why money could be "on hold".
Maybe you sent the same amount of money in a short period of time (some days).
Or you are not verified enough. If you are german, you have to be tier 3 and send an ID Selfie.
For the most EU customers, there are no problems, just a higher fee in September. For germans there is this ID-Selfie problem. Not everyone want to do this of course.