Single sim phone sent when the contract states its a dual sim phone.

So my mum called in on Friday and did an upgrade to the note 20 ultra 5g dual sim. We received the phone today and they sent us the wrong phone with a single sim. Where the advert clearly states its the note 20 ultra dual sim. We called cellc and they said it will take up 2 working days for the matter to be looked into. My mum bought this phone for my sister's birthday which is in the weekend n now we have no gift due to cellc error. I really hope they can resolve my mum issue by Sunday and provide us with the right phone and colour of the phone before Sunday.