Indian Bank — Service charges deducted for using Indian Bank as merchant bank used my HDFC credit card

Address:

Valasaravakkam, Chennai

1. Initially informed through phone banking the HDFC customer relation officer on my planning o[censored]sing credit card for the college fees for my daughter based on counselling selected college. Customer relation officer assured that there will not be any service charge for any amount based on my credit card limit.
2. Based on his assurance, used 10.2 lakhs in Meenakshi Ammal dental college (5.1 Lakhs) & Meenakshi Ammal general hospital (5.1 Lakhs)
3. unfortunately the merchant banker (Indian Bank) deducted the service charge 2.5% + GST (around INR 14, 443.20 for each transaction) totally INR 28, 886.40 is deducted for 10.2 lakh transaction.
4. used the same card in different hospitals and colleges without any service charges.
5. requesting Indian bank to return service charges