FFS, @IrishTimes!
There are pallets, and there are palettes, and there are palates.
They are three different things. Will I have to go in and teach you all English?
A little clarification, since this is a topic that people are surprisingly passionate about:
“Next Sunday” is in 6 days. Because it is the next Sunday.
“This Sunday” is also in 6 days. They are the same day.
So is “Sunday coming”. Same day.
However, If you have already referred to Sunday coming as “this Sunday”, you may then refer to “THE next Sunday” as the following Sunday after that, but that does not make it “next Sunday”
Generally though, If you want to talk about the Sunday after the next one, you should say “Sunday Week”.
Hope this clarifies matters, and resolves the issue in a way that requires no further discussion.