My first purchase with greendust is a Philips 2.0 speaker which received in broken condition. Since being a technician and don’t want go through all the hassles of returning it, I fixed it with some hot glue.
My second(and definitely last) purchase is a power bank with LED light built in - which is a plus for any hobbyist and the reason I selected that particular item. But they shipped a lower grade cheaper power bank. Since no one could fix that, I send a mail to greendust. They responded almost a week later. When asked about replacement they said replacement cannot be done after 3 days since receiving the shipment.
In short, please avoid greendust at any cost. They are simply FRAUDS.