California lawyer here. In all candor, I do my best to avoid civil litigation. But there are some rules that probably apply. Disclaimer: I am not admitted in Illinois, so I'm not offering legal advice you can take to the bank. Or to court.
The preliminary question: are the additions they failed to charge for items the OP ordered.
If they are not, I think they are SOL. That's not a legal term. I am not aware of a jurisdiction in the US that gives a seller special status because it's moronic.
If they are items OP ordered, the analysis is necessarily different. That they let you take the Mav without charging you for the additions you ordered makes them look kind of stupid, but it doesn't necessarily mean you don't have to pay them. In that case, use the payment as a cudgel to get them to follow through with the private offer. In this scenario, they aren't evil to request the payment for things you ordered. But they look like idiots. Use that to get them to follow through with the private offer.
Good luck with this.
The preliminary question: are the additions they failed to charge for items the OP ordered.
If they are not, I think they are SOL. That's not a legal term. I am not aware of a jurisdiction in the US that gives a seller special status because it's moronic.
If they are items OP ordered, the analysis is necessarily different. That they let you take the Mav without charging you for the additions you ordered makes them look kind of stupid, but it doesn't necessarily mean you don't have to pay them. In that case, use the payment as a cudgel to get them to follow through with the private offer. In this scenario, they aren't evil to request the payment for things you ordered. But they look like idiots. Use that to get them to follow through with the private offer.
Good luck with this.
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