User Activity

See the attached image. I can't click anything, nothing changes when I try to access a support/contact us via other items/issues. I have no idea what to do in this situation or why it's occurring.I will add also that I have tried on multiple browsers...
I am new to selling and am unclear what the rules are to shipping by Canada Post Lettermail. In particular, for items like trading cards and game manuals, can these simply be mailed in a regular envelope with some rigid paper/thin cardstock to preven...