If you have received statement.. you can have a look at the bottom of the statement..
You will find cashback earned and cashback credited..
Cashback earned is what you have earned during the current billing cycle. This cashback earned will be credited 2-3 days before next statement generation date.
Cashback credited is the one which has been credited during current statement.
I hope this resolves your query. If yes then please mark this as the solution.