Horrizontal compartmentallised resrvation

I am selected in Uttrakahnd public service commission exam for junior enegineer vaccancy. I cleared written as well as interview exam as Gneral DFF canddiate fulfilling all education & marks criteria of commission.In Commision advetisement it was mention that horrizonal seat for DFF/EX-SER./PH was provided in various social categories i.e. Gen/SC/ST/OBC.The seats were allocated in horrizontal compartmnetallised reservation manner. but after final result one SC DFF candidate was declare successful in Gen/DFF seat. And in other department result in SC/OBC - DFF/EXServ. Seat due to non-avalibility of candiate, seat were shifted to their respective social category. I asked to commision regarding the matter but they were also confused with the principle of compartmentaliised horrizontal reservation & said to consult for Lawyer. They were giving example of Uttrakahnd Women reservation rule but i check out that rule in that it was indicated that if no. of seats for Male/female candiate are clearly advetised that their will be no horrizontal reservation in that case for women & it would be rather a vertical type of reservation.Please advice on this matter should i filled a writ against the commission. My merit is less than SC DFF canddiate Regards Himanshu Pant