Samsung — Faulty transaction.

Hi,
I had a issue with payment while trying to buy a phone through Samsung wesite( Samsung Shop Order ID #[protected]). Money was deducted from my bank account but order was failed and cancelled saying it was due to payment failure. This happened on March 4th 2021.
Since then i have contacted the bank and raised a charge back request to the Merchant bank( Merchant is Samsung here).
But it's been more than a month since the request and maximum time for return of the money was 30 days. Now the bank is saying i should contact the merchant for resolution.

I have also contacted Samsung customer care. And they have just told me to contact the bank.

So I'm writing this to seek some console.

Please advise and please help.