HDFC Bank Home Loan — not sanction top-up loan and not refund processing fee

My top-up loan file no.[protected] i paid procesing fee rs.5900/- in april 2018.
I have already taken home loan from hdfc. But for top-up loan unwanted document demanded like zerox copy of blue print plan. I cannot provided this in time. When i submit plan copy to salex executive ms. Pradnya mhaiskar, hdfc bank, badlapur branch she told me you should pay again processing fee rs.5900/-
I cannot paid two time processing fee hence i told cancel my loan application and refud my processing fee rs.5900/-. May times i contact to sales executive ms. Pradnya maiskar but she not responding for refund of processing fee and not ansering any reason. I yet not get my processing fee. I request that refund my processing fee rs.5900/- immediately. If not refunded in 7 days then i will complaint to rbi and other forum.