If an order contains different items, it is possible that they ship in separate parcels, such as for better protection of items, weather proofing, or other reasons. While it is possible that some items may have been mistakenly missed, it is more likely that they have shipped in a separate parcel. Please email your order number to support along with a description of what was received and what is missing, and a support representative should respond by tomorrow with tracking / explanation.
As for emails, if you ordered directly online, you would have been sent an order confirmation email and also a tracking email, if those are not in your inbox, please check your spam.