i recived a invitation about seller flex onboarding. When I click on the registration link, I have fill my address and then not getting GSTN Details only scrolling. I tried so many time. But same erorr. I have talk with seller support they alo don't know how to deal with this. I want seller flex but amazon not giving me any help. I m very disappointed kindly do something. Seller support service going to be like meesho.