Aim smart TV firmware update

I have an Aim TV smart tv version 7.0. When I bought this TV 4years ago I was able to watch Netflix, Prime Video and Showmax by simply downloading the apps. But as of today I can watch neither as I’m unable to update them nor the firmware. I’ve been browsing the net for answers and clues but I honestly doubt I’ll find anything nor if it’s even possible. I’m wondering if this then means I can’t use the TV at all and need to buy a new one. I’m really confused.