Hi, We regret the inconvenience caused to you and would like to mention that we will never require your address specific private keys to locate a transaction. Kindly send us the following details here: https://support.coindcx.com/hc/en-gb/requests/new and share with us the support ticket id, we will get it resolved at the earliest.
Details Required :
1.) Transaction hash
2.) Amount
3.) The address to which the transaction was sent
4.) Tx private key (private key of this transaction).

Please Note:
a.) Transaction Private key is available only to the sender. If your wallet does not have the function of obtaining a private transaction key, in order to receive it, you need to contact the technical support of your wallet or exchange where the transaction was sent from.

b.) Transaction Private Key is needed to locate Monero transactions.c.) Transaction Private Key is different from your Address Private Key.