Brothers, thank u all for very helpful suggestions.
keeping in mind these suggestions I have decided that
tomorrow I will take the battery to an experienced man, he owns a shop which repairs and sells batteries.
If he says that battery is fine and without issue. Then I will give the battery for recharging and will try to give an extra
earth to the battery, maybe this will work. If this doesn't work as well, then I will take my car to some authorized dealers.
Thanks again all =D