Kmart 50cm Trax Dual Suspension Bike

My 3rd unassembled bike purchase and only one I’ve failed – I couldn’t find an assembled bike so took the risk of purchasing home delivery.. TL:DR do not do this. Just one of the handbrakes isn’t assembled, how to is not included in the instructions. Entire steps are missing on how to put the front wheel on, brake pads are in the way. Fine, I YouTubed it, got it done. No video for this particular hand brake however, no tools come with it (3 different sized Allan keys I already have don’t fit into the one particular one I apparently need to loosen, nothing from my admittedly limited tool set works). Kmart Customer service have the same handbook I have and the instructions don’t exist.