I have two mobile accounts on my telecom bill (and that's the only thing) - the first is mine, on a 24 month contract, and the second is my wife's, on the old $40 smartphone plan.
On our last bill, she managed to incur $60 worth of txt messages over and above the 300 included.. (she sheepishly said "oops"), so I decided to look at the current postpaid offerings, and move her to a new plan. After looking, I was pleasantly surprised to find that the $29 open smartphone plan is an upgrade, and cheaper to boot.
So, I decided to 'upgrade' her, by following my nose on the website - after filling out the right details, and following the confusing direction to proceed as if you're getting a new SIM, then check the 'use old sim' option later in the process. No problem, clicked submit, with an order value of $0. Get all email notification, etc etc.
This was Friday night - I think I checked her plan using Your Telecom on her phone on Saturday, and it still showed the $40 plan. So, at that point I called customer services to check when it would actually change over. The guy on the phone largely seemed confused about what I'd requested, and what I actually wanted, but once I think he worked it out, he said he'd get someone to process the change first thing Monday.
I haven't even looked since then, as I'm not that bothered about it, just wanting to make sure that things actually progress as they should, since the whole process on the telecom site seemed very clunky and crap to be honest... not integrated with my account at all.
So, anyway, cue today, when a sim arrives in the mail. what do I do now?
tl;dr: plan change on existing SIM via telecom website ends up having a SIM arrive in the post.