Refund

I bought some things last week Monday only for me to receive an email in the evening 2 days later that the order has been canceled due to "inventory error" and they'll refund me back my money. They made the refund of the 3 items I bought separately which I don't get because I didn't pay separately but full price. Now on Sunday I only received refund for only 1 item out of 3....it's been days now and I haven't received the refund of the other 2 items. Yhoooo I'm super disappointed and annoyed