Bro, k2002. Your piston ring kong already. Have to change the piston ring. You also say your car like want to die already. No power isit ? because your piston ring not fit with the cylinder wall already so the lub oil will go into the combustion chamber and conust with the fuel that's why you have white smoke.
But you have to do a combustion pressure test to see which piston has a pressure leak. Sometimes only one piston got leak and the other is ok.
If you have a pressure leak. Usually, things that will be changed is the top gasket, cylinder head gasket, piston ring and might need to rebore a bit the cyliner wall because you cylinder wall might have been damage already. The mechs will know what to do wan. Dont worry.