BTC deposit old address exchange

Answers

You are right, the only ones who should have access to that address is CoinsBit.io.

If they claim they are unable to recover the coins, there are only three possible scenarios:

They have lost all copies of the private keys, or the root key used to derive them - this would be extremely irresponsible of any exchange, but does not appear to be the case here since the coins have been spent, which requires access to the keys.
They have been hacked and the old address' keys are compromised - this would imply that the coins were spent by an attacker, and the exchange no longer has access to them.
They are simply exit scamming and taking funds from users.

In all three cases, no one here can help you. Bitcoin transactions are irreversible, and without the private keys the funds are immovable. You should consider engaging a lawyer and going after them via the legal system.

Raghav Sood

Posted 2019-07-28T09:36:04.010

Reputation: 10 897

so they are scam cause they told me 10 days ago we dont have access but they transfer my BTC 8 days ago to another addresses – hadi.hp – 2019-07-28T10:05:20.217

We can't tell you if they are a scam or not, you should consult a lawyer – Raghav Sood – 2019-07-28T10:56:38.130

they steal our money in many ways thats why they are scam and i saw many people that they lost money because of coinsbit.io even my friends – hadi.hp – 2019-07-28T11:24:16.030

Unfortunately, this is considered off-topic as your talking about an issue with a company. Giving you advice that you could have been scammed by the company. Next time when receiving the coin, consider a software wallet and never online wallet (unless it is trustworthy). TL;DR: If you do not own the private key, you don't own the coins. – zhiyan114 – 2019-07-29T20:26:55.023