fraud call from customer care VI office

bellow given number i got call, its from VI office, customer care executive offered a plan for 40 days validity insted of my existing 28 days validity. they send otp to my mobile for activate the plan but they hide an important matter my further months all bills will be post paid. when discussing the new plan they didn't remarks any thing about the post paid billing on further all months. this is some kind of cheating the customer. so every one take care while attend the call from Mobile data service providers call especially VI