ripple deposited but no received

[Siddharth]

Hi
I made a transfer from koinex to different exchange of xrp coins couple of months back... the transaction was completed as per the blockchain but the exchange where i transfered saying that they never received it.
Now i am trying to check the history with koinex for transaction its not showing the transaction history of that particular transaction . I have shared the transaction id with them , they are denying it now.
Dont knw what shld i do now.
I am certain that i have transfered it from koinex as that time there was no other exchange in india

[bloodhound]

Did the receiving exchange require a tag?