Barad dur missing bag?

Hey everyone. I just ordered from Amazon during black Friday the barad dur set, which I had wanted for a long time. But I think I'm missing a bag? I just opened bag 5, I had only one sub bag in it. But I think I'm missing quite a lot of pieces. Does anyone know if there were 2 sub bags in bag 5? And is there any way to get the missing pieces?

Thanks a lot in advance!