@nauman_2558
the international model of corolla doesn't have rear disk brakes......it has drum brakes......the way these two types of braking systems behave is quite different.....the leading and trailing drum get their force that pushes them against the rotating drums from the drums.....this means that when drums are rotating slowly the braking force is less and vice versa..........therefor they usually dont jam the wheels like the disk brakes do.......most cars that dont have abs use the front disk and rear drum comdination e.g. city, sunny, lancer, cultus, mehran etc.
even the international model of corolla........
as for the solution of your current problem.....i suggest that you drive at very slow speeds for a few more months may be an year and wait for the new corolla to be launched (the camry lookalike) and pray that the new model doesn't have the braking issues.......or you can go to the supreme court and request CJ to take action against Toyota Indus and make them fix this problem in your car.....