Tel69: Interesting, It's not how the sales person/call center person explained it to me when I signed up.
Will have to see if I can get someone from Telecom on the phone who knows exactly what the story is.Cymro:
Nothing stopping you from changing back down to your original plan, you are not locked into the +20GB, just the base package
Cymro is right. your contract is for Total home broadband but you can change your data cap once per month to whichever version of that package you like.
I believe (though not 100% sure) that you can even switch between the different total home versions too with no penalty. e.g. you could move to Total Home Starter if you really wanted to.