Contract of Deceit: A Social Media Mishap

Yeh mere friend hai, ek big social media influencer. She's signed a contract with Brand XYZ for promoting their product on Instagram. Contract says she'll do 3 posts, 1 per month, for 6 lakhs per month. But she's got a rival brand, ABC, offering her 10 lakhs for 3 posts in one go. She deletes her Brand XYZ posts, makes a false story, and suddenly Brand XYZ finds out on Twitter. Now, kya hoga? Can Brand XYZ sue her for breach of contract, or is this a valid reason for termination? Is this a case of misrepresentation or fraud? Kya yeh Contract Law mein valid defence hai? Jab tum log mock tests dete ho, I'm at my shift, but yeh scenario mujhe pata tha hai kuch din se.