not sure if you’ve seen bits of the past episodes but Izzat is working at Humayun’s family run News channel and hosting a blockbuster show which is getting them high TRPs. The mom doesn’t want to let her go because of the lucrative business she’s bringing in and Shaahan wants her out at any cost. Mom makes Affan the Producer/Manager over Izzat’s show. Izzat is his ex- and Mom wants to see Affan has grown up and can handle the situation. Of course he cannot - he’s a total baby 
So Affan asks Izzat to name her price, she says some x number of crores and he writes a check for it. She gives the check to his Momma and writes a scathing email and sends it to all in the office which makes Affan and family look like a bunch of losers. So now Momma and Bhai are really upset with Affan which is exactly what Izzat wanted - to destroy Shaahan’s family.