I received $50 BTC from a friend. My exchange froze my account withdrawals. How is this fair?

Got a message today that my withdrawals are suspended. Support says my account is 'linked to high risk activity" and they are investigating. (No other tx done)

Three hops back there's an address flagged by whatever system my exchange uses.

So now I'm frozen because of who my friend's seller's seller/sender transacted with. I don't even know these people.

Has anyone else dealt with this? Did it resolve or is my money just gone?