Withheld NOC application without any Reason

Respected Sir/ Madam, I am currently working as a Junior Engineer in Southern Railway. I completed my training and joined in regular service in Feb-2022. During training period I applied for Kerala State PSC examination for the post of ASSISTANT ENGG. giving due intimation to the Railway organization. Now I cleared the written examination and waiting for Interview. Prior to interview Document verification is there and I already given declaration to PSC that I'm working in Railways while submitting my application. So I need an NOC to attend the interview. For the same reason I submitted an application for NOC to Railway administration on Feb-01-2022 (Prior to getting regular posting). But the administration not issued my NOC till date and the reason for the same is not conveyed to me. As per Chapter 14 of IR Establishment Manual an employee is eligible for 4 NOC per year. As per Railway Establishment Rule chapter XIV. (1410. Regarding the Refund of cost of training ) it is said that Non-gazetted Railway employees who have received training at Railway expense whether in the form of an induction training or in a specific avocation may be exempted from refunding the cost of training in the event of their selection to other posts under the Central or State Govt. or in Public Sector undertaking / Autonomous Bodies wholly or substantially owned/financed /controlled by the Central Government or a State Govt. So my Questions are: What can I do on my behalf to get the NOC on time During joining I executed a Deed of Indemnity with railway. So if I'm resigning from railway, am I exempted from repayment of training cost. I also came to know that the Dept. Of Public Enterprises also issued some orders regarding the above. So Please give me valuable advises.