Spice Jet Airlines — regarding check in

Pnr - x3mjnr, in reached hyd airpor at 5 10 and im flight is at 5 50 on 19th nov 2018. They actually checkd in other passenger on my name i dont knw how the hell they did it and they just gave an excuse that im late for boarding. I begged them to helpout plz becz its ver important flight for me as i have exams, still they didn't responded (They said we r helping but im see and hearing evrything they're jst chilling and laughing with there colleague's. I think checking in other passenger is there mistake so they didn't even inform d manager and when i asked they are saying im late eveen though im 40 mins before for boarding. I'll never book spicejet and i'll say my friends and everyone to never book spicejet, it is the waste airlines