Consumer Redressal

I have taken the balance transfer on EMI in march 2020 after that they never provided that amount in my other bank credit card or through cheque after that they showing that amount on outstanding I write mail I did not receive the amount but the people they hired is uneducated and illiterate saying you have taken the balance transfer I told that never get ask them to call back and explain the issue then after listening to my issue the supervisor disconnected the call and never call back then I write hundreds of mail and tweets always they said trying to contact unable to get through but never a single call received and now they are applying to charge on my credit card outstanding and blocked my card and all daily called me to pay in this lockdown where as we are getting less salary how will i pay 50000 which i never get from their side whats to do