Firstly file a police complaint for cheating and fraud against the fraudster. Further file against the bank with the banking ombudsman. If they banking ombudsman fails to resolve you can appeal it is fast way then the consumer court.

Alternatively this is deficiency on part of the bank file a complaint against the bank before the consumer court. 

In banking fraud irrespective of the platform used to commit the fraud the culpability of deficiency of service of bank is resumed and hence the Bank by RBI Circular is bound to compensate the customer.

So in such circumstances filing a writ petition is better remedy than filing a case before the consumer forum. 

1) you can rely upon police complaint filed by you against fraudulent transfer . file complaint against bank before consumer forum for deficiency in service 

2) mention that unauthorised banking transactions were done under payment gateway and UPI fund transfer facilities 

3) that you have not opted  for UPI facilities 

4) seek refund of your money wrongly debited from your account 

5) also litigation costs and compensation for mental torture undergone by you 

You don't have to prove just file the consumer complaint with documents.  The court will pass the orders

This is not a matter of consumer complaint but criminal case. File FIR.

Hello, 

File a claim saying that no action has been taken by them for recovery even when they know as to in which account the amount has been credited. this in itself amounts to deficiency in the services on the part of the bank. 

Regards  

issue a legal notice through an advocate to bank and file complaint before district consumer forum on Defeincy of Services. 

First you create an evidence against the bank by giving a complaint in writing to the bank and seek refund of the amount fraudulently  swiped away from your account by some fraudster.

Obtain their reply in writing about the action they would like to take or the time that will involve in the actin they proposed to initiate on this.

You may wait for their action and if there is no action or response from them till the time they have promised, you may exhaust the remedies with the banking ombudsman in this regard, if yo dont get any positive response from the ombudsman then you may approach consumer forum mentioning the details and the steps taken by you  which will be sufficient to prove the deficiency in service by the bank.

You should lodge an FIR against the fraud to economic cell of police of your district.

Also file a complaint with banking ombudsman of bank is failing to resolve the issue.