Sansui India — lagging...

My phone keeps on lagging it i cannot play games even on very low graphics and if i open any app it lags continuously and an option come close app this happnes every single time it cannot able to play the minor games even it lag still but still shows 2gb ram which very comfortable for minor games or apps if open the youtube app i found that even youtube is also lagging continuously and if i play a video in the app there a continues lagging after that the app freeze and phone closes it self and the same thing happens with the minor or the major games so team sansui hope you take actions for the problem and solve it in next coming update and make the phone performance better than the previous
Thank you