Not informed about package change

I have been with Afrihost for quite some time now, and never had a problem with their services ever. I used to have a 25mbs line which is way more than enough for me, but today I received an invoice for March that showed I have to pay for a 55mbs line. I never requested the upgrade. So, i contacted them via the Whatsapp chat, where i was informed that "Octotel removed old packages the 25mbps has been discontinued and was replaced by the 55/25mbps package." I then checked all my emails and smses and then informed them that I was not notified of this. The said they did inform all clients in January, I then checked all my emails in all my folders (even spam and trash) and still found nothing.

How do businesses not communicate these things with clients and just use such an easy excuse to get away with it? Now I have to pay more for a line i didnt ask for without accepting it. Afrihost is the host and the business who communicates with the clients, yes, but Octotel made the change and no way was I informed.