dear if ur mehran car shocks r oil shocks then repair it if they r gas shocks then replace it with oil shocks.if shocks r not working then u will feel while driving the tyres r loose n there will be no stability in ur car steering so repair it.
Second buy new china axle which is i think one for 1600 rs, dont buy qabli as they r already used but while changing shocks make sure engine foundations r right n tight otherwise u will heard a bad noise of godda in axle.
Repair shocks price for 2 600 rupees.
change axles with new china ones i think 3200 will work for more then a year