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Follow the escalation matrix and Citizen's Charter for lodging the greivance.Add cost of each representation in person ( mention travelling, parking charges etc), by letter ( mention typing, travelling charges etc), by email ( mention internet, cyber cafe, operator charges, travelling charges etc), phoen call and that represntations does not come free to you and costs hard earned monies and precious business , family hours and you do not agree to waste it on the non wroking employees of the bank and demand an amount as deemed fit.
If you are not satisfied you may forward your complaint/issue notice to Nodal Officer and Chairman of the bank.
If they also maintain studied silence you can complain to BO/Consumer forum.