How to find duplicate transactions

Describe the problem:
I have a problem with many duplicate transactions, this is because of the Crypto-com not importing all the transactions via api, so I am using the api and also importing the other data with csv. The problem is that I have too many duplicate transactions, is there a easy way to find duplicate transactions?

Which exchange/wallet is this regarding?
cryptocom

How did you import data into this wallet?
api and csv

What have you tried to fix this so far?
delete the duplicate transactions manually

I have another example of this, when I have import the transactions of my Ledger with a csv file, it did duplicate many transactions, does anyone know an easy to to help filter all those duplicate transactions?