Chev sonic a dud

I bought a chev sonic 1.3d in 2012. Since then, the engine blew up, where i only received the letter for the call back about a month afterwards, no extension on the engine warranty i might add, numerous other call backs and to put the cherry on the cake, another letter for the same problem as when the engine blew up!!!! I do not have the luxury of dropping the car off and make other plans easily. it is difficult enough to take the car in for a regular service and now i must take it back in between service as well!! I dont want to drive the piece of **** anymore. Im always fearing me and my family go long distances to find the car must go in for another severe call back.