Difficulty in getting obc non creamy layer certificate

Sir, I have my father's house in lal kuan, chipyana gautam buddha nagar district up for nearly 18 years. But the native place is in bulandshahr up. I have been applying for the obc non creamy layer certificate for nearly 4 times and each time my application has been rejected by patwari of chipyana village. When I called him he simply used to deny saying that he won't make it and to get it made from bulandshahr itself. Now for the 4th time I talked to tehsildar dadri for this and he told me to get my caste ascertained from bulandshahr and gave a letter addressed by his own name to tehsildar bulandshahr requesting him to do the verification. I personally went several kilometres to bulandshahr to get the job done. Now when I again applied ,thinking that now it will be done, my application was rejected. When I talked to Tehsildar dadri asking him why it is rejected, he talked to patwari who told him that how he knows that I am from the given caste. Now patwari says that I go to bulandshahr tehsil again and get some letter number for record and contact the patwari of my native village to get this done. It has been a troublesome experience for my parents who are quite worried about it and also for me as a student, who has lost so much of crucial time running from one office to the other . Sir, What do laws say about this and how do I get my work done now? Please guide. Thanks...