Case against ICICI Bank Vasanthpura Branch, Bangalore

Hi, My Name is Jyothi Basavaraj (NRI customer) . I approached Vasanthpura Branch ICICI bank (Branch code 003179) in November 2019 to ask if they can accept my Home loan transfer from DHFL Bank. Branch Manager and Home Loan Officer accepted my request with a known factor of loan being a registered mortgage. After accepting my documents and check (Rs 27,081 + Rs 500 for GPA) , they said the loan is rejected because it is registered mortgage wasting 1 month of mine. Since then they have failed to give me any email communication or refund my amount despite of frequent follow up and bank visits. I am now being told, they will deduct application processing fee of 2500 Rs + there will be a tax associated with this amount which I fail to understand why there would be tax to the money i gave bank. Irrespective, I have not received any money until date. I was in India for a short period of time and wanted to get home loan transferred instead i am still following up with this branch employees for my money. I have logged ICICI service ticket request, reached out to head office and there is no response from the customer service. I always message or call the managers or my parents follow up going to the bank, till date we have not received any email confirmation about the next steps or what happened to my money ( was asked nearly 100 times - not exaggerating ) . Kindly help me how I can submit a consumer court case against this branch and employees within. I am really frustrated with these people and incurred losses, they do not seem to budge. They do not follow any process, they are not transparent and do not communicate anything on email. I doubt that they have misused my money and not do not have any answers for me.