I can suggest this , soak in cold water and rub in good old fashioned soap bar, soap . Leaving the soap on and the clothes free from water for at least 1/2 hr. back to cold water ,give a rub to the stains. This time rub in more soap and pop into your washing machine on a 40ºc normal wash cycle , adding your normal washing powder. Once washed hang the clothes outside in the sun , the sun will bleach any remaining stains out the natural way, If the stains are hard to remove , every now and then sprinkle cold water on them whilst they are in the sun . The old fashioned way of removing stubborn stains , I can also suggest a product called Dr Beckmanns stain remover, but not sure you can find this where you live , this removes every kind of stain there is. Look it up for yourself