So to make a long story short, I purchased Avast Premium from my phone (since my computer is filled with viruses and I’m not trusting it with my credit card information) and when I logged in to my account (via gmail) from my computer I’ve been told I have yet to buy any subscriptions whatsoever.
I don’t get it, it shows up and works just fine in my phone.
It seems that you made your purchase via the Google Play store and cancelled your subscription.
Once you cancel a subscription, it’s removed from the My subscriptions page.
Currently, Avast Security Premium will not appear in your “My subscriptions” if purchased via the Google Play store.
You will have to manage your subscription via the Google Play store https://myaccount.google.com/payments-and-subscriptions
Sorry for the inconvenience.