Software issue

Hi. I purchased a Samsung A20 cellphone just under 2 years ago and now my phone is to old to support whatsapp notifications and I have been told by my employer to buy a newer phone because it's causing issues with communications. I think this is rather unfair that I have to buy a new phone because my android system is outdated.

My phone is fully updated with the latest upgrades. I look after my phones and expect them to last a few years! Yes, it is not a fancy phone but I worked hard for my money for it to be thrown down the drain because of your software not being able to support an app. Can you sort the software out on your next upgrade please.