Corporation Bank — 7000 amount is debited from my account in ATM, but not received

Address:

corporation Bank, vidyanagar Branch Gulbarga

On the date of 01/10/2020, 7000 rs amount deducted from my account, but i not received, i given complaint to bank but no responce yet, simply saying we logge complaint, but when i ask to give referance nor they not giving saying server busy, i totally frustrated with bank, i request u plz give my amount 7000Rs