how to add investment..?

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i've invested $20 in eaindex. Now i've earned around $25. Iwould like to invest another $20 into my acc using the money i've earned. But i have problem doing so. Any mylottians knows how to do that..? And recently eaindex have problems with their site..And some of my friends here can't withdraw their money..Do you think that eaindex is having a problem..?