Now, I see that's why you use the poolin wallet because you can't able to reach the minimum withdrawal of 0.005BTC or 500k sat. I thought that the 270k funds you talking about are 270k in USD,

For now, the only solution to this if you want to withdraw the amount from poolin wallet is to provide your identity and you can trust them because it was trusted pool since before.

Next time if you can able to reach that minimum withdrawal 0.005BTC you can switch to other mining pool that you can able to withdraw at low like ViaBTC the minimum withdrawal is 0.001BTC or 100k sat.

Check the other mining pool from here https://miningpoolstats.stream/bitcoin and look for other pool that you can able to withdraw with lower minimum payment.