This is what Glow Power said in their Terms and Conditions about price increases. I was never notified "two ways" about any of their 2021 price increases.
"09. Changing Pricing and this Agreement Unless you are on a fixed price contract, we are entitled to change the price of electricity. If we do so, you will be given 30 days notice in advance of the date the variations are due to take effect and notified in two ways from the following methods: • In writing on or with your bill, • By email, SMS text message or by letter • Mass Media (TV, radio, newspaper advertisement) • Website"