Thank you for choosing Electric Ireland as your supplier.
The offer for Google Home Mini is an online only offer. It is just available via the link you provided. If you requested the Nest via alternative means, then it is unlikely you would be entitled to the Google Home Mini offer.
We recommend contacting the Home Services department directly on 1850 372 333 to check if you are unsure. They are available from 9am to 6pm, Monday to Friday.