I'm sorry to hear that you've had these issues!
You can change your plan at a time that suits you just by using our website - you don't even need to talk to anyone! Just follow this link, choose a plan, click the "Select" button and follow the prompts from there!
Sorry, @tejadeep this site and community is for AGL, the Australian energy provider, not AGL the linux distro 🙂
Our customer service team will be happy to help you with this. You can get in touch with them here.
You can chat with a member of our customer service team by logging into your AGL My Account here and then clicking 'Message Us' in the bottom right-hand corner.