Seller / Real Estate Agent Cheated

[Ramana Kotte]

Hi,

I put an offer for a Townhome in Charlotte through my agent. And the seller came back with a counteroffer through his seller agent. After some conversations finally, we accepted the counteroffer from the seller agent and told them verbally & by written and then sent the signed documents to them. Now after we send the documents now the seller agent sends this (We have received multiple offers on this property. Please submit your highest and best today by 5:00pm. If the current offer is your highest and best please reply and mention that.) to all the buyer agents. I know it is unethical but anyone from NC state can confirm if this is legal or not? Can someone help what can I do in this case?

Any help greatly appreciated. Thanks in advance.