Monthly interest Discovery bank say they cant show me until investment mature - thats CRAZY - what are they hiding?

I opened a 12 month investment account and when I didnt see interest accumulated after the 1'st month I called to find out why and if I can get a statement. Apparently - they cannot show the interest because I said I want the interest paid out at the end of the 12 month period. That is insane. Surely i should be able to see if. It seems like they are hiding something. Every other bank shows the interest received per month. I worry that if i wait for the end of the year they are only going to pay out the interest off my initial payment and not my accumulated monthly interest. Every time I call the call centre they tell me there is no manager available - that also cannot be the case. It seems very ***** to me.