I have been a customer for long time. You need to verify your phone number once and then you will get your items then next purchase will be faster. If they ask for certain documents its ok they just need to make sure if you are a scammer or not. I have been dealing with them since 2017 never had an issue even with refunds it take 3-7 business days. You just need to contact live support and they go quiet means they are applying updates or fixing your issue dont rush on them :).
Peace.