Can you share the website if what is Luno, never heard this site before.
Anyway, you can try to clear your history and cache by going to settings>history> then clear data.
I suggest you to use a well-known wallet for mobile like electrum or mycelium for android then for IOS phone you can use Green Address its also support on android OS.
Luno is a crypto currency platform that operates mostly in Africa. Its more of a centralized exchange sites on a mini-level where you can buy or sell selected crypto currency. It also has a market section too where selected coins are traded in relation to the local currency rather than dollars or euros on those global platforms. Its legit and straight forward. I know this because I have used them before but was discouraged when I was being charged fees for incoming transactions.
What would probably happen to Op should not go beyond his internet services or browser issues and as suggested, I wish he can just come back and update the post for everyone that have made conclusions based on his earlier post.
