HDFC Bank — Employee misbehaves

I am a student from IIT Madras recently we got a mail saying that we can get free credit card Diners Club Millenia International card without any annual charges and many other benefits only for iitm students and many o[censored]s employeed and later we got to know that Annual fee will get waivered only if we spend 1 lakh, They didnt specify proper terms and conditions to us. One person from hdfc bank called me and told about this annual fee instead of accepting that there is no such offer she blamed me for responding late where as whenever she called i picked and sent necessary documents whichever are required(i have proof of call logs and whatsapp chat) after blaming me she asked if should process your application for other card for which also i have spend 50k to get annual fee waiver so i told her that i will ask my family and get back to her, today when i called and told her to not process my application she was like i already processed it, without my permission how can someone process it and she started blaming me for that as well when i asked her name and branch so that i can raise a complaint against her she refused to say and she was like i will right away cancel your application, but i was deeply dissatisfied with the treatment that she gave me she lied, she blamed and she talked very rudely. Not only this regarding the free credit card offer 10000 students in our iitm realised that this offer given by hdfc is a fraud, just for the sake of sales please do not send such fraud mails and the bank people who call us treat us like beggars and behave rudely. It is the worst experinece i have had from hdfc bank. ( The employee number is [protected])