The old greasy bait and switch with this company a...

The old greasy bait and switch with this company at Three Crowns, Las Vegas. I was approved for residency, cash purchase - received email with price, dates and stipulations for deposit and proof of funds. 12 hours later a text message from Joanne stating the price went up with a sad face emoji. No other information. I texted her how much and to reply by email. No answer. Then I call her - up $10k 18%.
What kind of sleazy company does this kind of thing and what kind of business person uses text message to discuss price. I am not out a dime and thank my lucky star. I have a call into the DA in Michigan and a call to Clark County DA to discuss the issue.