Hi @Ssmith,
Welcome to AGL Neighbourhood!
Although the rates on your account may have increased over the last 12 months, it's always a good idea to check and make sure that this is not the only factor contributing to increase of your bill. I'll send you a private message to get your account details from you so I can look into your this for you and check that you're on the best plan that we have available.
Kind Regards,
-Olgi-