I feel your pain: I want to cancel a line, so stood in line for more than an hour on Saturday and they told me to go and register first and then 'link the account, it's easy'. Went home and tried (on multiple browsers)... Nada. Went back to the shop and watched while they tried: again Nada. They have no clue what's going on, and no idea how to resolve it. They seem to purposefully make it impossible to cancel a line. Never mind the obvious issue with their systems.