Unreasonable Increase In Locker Rent By Canara Bank Without Giving Intimation

I have a locker in Canara Bank. I have given full communication detail to branch, Mobile No. e-mail ID and address for communication but in April 2021 branch debited just double charges as was previous year without giving any intimation. I inquired about this increased rental just 100% increase, branch manager replied that a notice was pasted on the notice board of the board. On the ground of this reply from branch, I complained to Bank Ombudsman. This complaint is rejected by Ombudsman as per provision of Clause 13(1) (a) of Banking Lokpal Yojna 2006. I am not satisfied with this decision. Where and how I can go for further action against it.