SOLUTION : Uninstall and reinstall the Advanced Cash on Delivery app by shopify, It took me 2 days time for it to start working. Maybe some cache issues from my side or idk.
Shipping Method 1 :
Payment Method 1:
If a customer chooses COD Shipping which includes some COD handling charges of say Rs.60, post this stage, the customer is taken to the Payment Method stage. Here, the choices shown are Online Payment Method like Credit Card, Net Banking, Debit Card, Wallets etc. along with Cash On Delivery as another option. This may be confusing to the customer, asking them to choose one of the payment method again.
Solution (How to do it?):
Shipping 2 :
Payment 2:
As shown in the Payment 2 there is no COD option available when Standard Shipping is selected and vice versa for when the customer selects the COD option there wont be any Card payments available except the COD option. 