A rather dubious service ... I am sure that to "unlock" you will need access to an account on the exchange, and subsequent fraud (for example, the passage of the KYC on fake or someone else's documents). An alternative option is corruption schemes within the exchanges, but I am sure that high-quality exchanges will not go to such actions because it is very questionable, from the point of view of legality, "business"
You apparently did not have large sums stuck on exchanges for a long time. Especially when these are your working capital and without them your business can drown pretty quickly. When this happens, a person is only interested in one question - how to get them out.
But we usually work in the legal plane.