They take 30 days from the order date to show on your account but should show in your order history, if it's over 30 days ago, I'd use live chat, at the top of the screen and ask customer services.
I made an order today and wont get my points until 6th october and the ones I got today were from the 11th august if thats any help to you. Check your account and it should show you when they are due.
I think it'd be computerised so I'd use the chat and ask them, I just checked my account, my last points were credited on the right date and I have two others pending....