RBL Bank — rbl bajaj finserv supercard credit card - fraud by the rbl bank

I had booked transaction worth Rs.52k on EMI through RBL Bank but reversed within 2 minutes due to some reason. In the statement, they charged me EMI for same. I logged a complaint via mail but replies were so misleading. No relevant details were provided. they reversed the same in the next statement and charged me 1 month interest of that EMI. After calling customer care, she had no courtesy to talk and after asking for clarification again and again she cut the call. Why should I pay a penny even when the transaction was reversed within minutes? Customer care helpline told me that in such reversal cases you need to call to RBL and ask them to reverse. Means RBL has no system infrastructure for reversal transaction and due to their inability we need to pay from our pocket. Also, attendent said that GST is paid to government hence no reversal is done for that. Who authorised them to do this thing? This means for smoothness in their life they shift all the burden to consumer. Totally fraud this is.