A missing confirmation email is common and usually fixable. The important thing is not to order again.
Look in spam, promotions and any other folders, and search for the brand name and the order number. Check that you typed your email correctly. Allow some time, as emails can be delayed.
Check your card statement or banking app: a charge confirms the order exists.
Contact the official seller with the card charge details, the date and the name on the order. Ask them to resend the confirmation. Do not place a second order. Keep your messages, since you need a record of the order date for the 60-day guarantee.