No return receipt for some items returned to Apple Store

Hi Community,

Returned a number of items to regent Street apple store yesterday. These were 4 items from 3 different receipts/transactions.

I have received an email receipt for the return of the items returned from 2 of the transactions however the final two items on the last receipt I have not received any email return receipt. Am slightly concerned this return may not have been logged correctly? Obviously the employee took all items and put some stickers on some and then off they went.

Should I go back to the store to enquire? Or should I wait for the refund to come in assuming everything has been logged correctly?