Punjab National Bank [PNB] — online transaction get failed but amount deducted from my account.

Dear Sir/ Ma'am, I had made a online transaction on 12th feb 2018 with ICAI but transaction get failed and my account debited with such amount. and i have not received any refund from bank till date.when my transaction on 12th feb get failed then I had contact to ICAI and they said that your money is refund into your account within 7-10 days, and now you do your new registration, and then i had made transaction again with ICAI and this time my transaction was successfully completed, but my money is not refunded in my account till date.
And i had also contact with my branch for this transaction many times, but i am not satisfied with the branch response.The transaction amount was 6569.26.