Problems with online order

I recently placed an order with MR Price Sport. Amoung the items was two rash vest exactly the tame size. I placed my order for two and paid successfully. i went this week to get my order and there is only one rash vest inside. I was refunded for the second one, but no communication was received that there was only one available. if i had known i couldnt get both i would have cancelled the order, as i have twins and i need two. i received no mail no call nothing.