we are talking about 10.6 bch that whas more than 20k when i did the transaction
Where did you send the bitcoin cash to?
Bitgo or Coinpayments?
Multisig address means that there are more than 1 private keys, and with the way it is set up, it may require most -- or all -- of the private keys to move the funds.
So you can see why it's a hassle.
Since the amount is more than $20,000, you can contact the recepient of the BCash and tell them to help you retrieve it. They may be willing to help you due to the amount involved.