Telugu Matrimony — Misguided Payment and no refund

My mother got a call regarding renewal from Telugu Matrimony. She replied them that she want sometime to discuss with family and decide but they kept on reminding her every 10 minutes and made her hurry for discount. She, purely under coercion accepted for a renewal. Then she told she would like have a gold package costing around 4K and asked her to give time for payment as she is aware of making credit card payment. Matrimony executive voluntarily offered a payment guidance and make my mother opt for Diamond package costing around 13K. After payment my mother was tensed and called back, but executive simply replied saying its u who selected diamond package and we cant refund it back. Upon request other executive listened her concern and accepted to extend the validity since amount can't be refunded. After my return my mom told the entire story and when I called to customer care to speak on this, they say it's your option to select diamond package and denied refund. If we can afford 13K, we would have chosen it at first instance, not after so much of struggle. We want a refund as we can't afford that amount for this purpose.