Useless Phone

I bought a Samsung Z2 on Saturday 23/06/2018 and the lady advised me that they have had complaints about the memory on the phone being small.

I was advised to purchase a memory card, to enable me to have whatsapp etc. I then purchased the phone for R649 and the memory card for R299.00.

Since then, I have been trying to download the apps that i want including google play store; which I have now found out does not work on this phone.

They have an app called Tizen store to replace Google Play, which does not help me bacause it does not have any south african apps... So when I try to download an app it tells me I need Google Play, which I cannot download!

This is extremely unfair and misleading. I am stuck with a phone that can only make/receive calls, sms and take pictures. I would like to exchange this phone for something that can provide me with the apps that I require.

Please advise on the way forward.