I'm confused. It would appear two people have started an argument which could be settled in a moment, but are completely ignoring anyone producing facts to end it.
Perhaps, abbylovesconnor, you could cut and paste the bit from Wikipedia which states that there will be a series 4 - it's still not a guarantee of a series, but I am curious as to why you continuously use this as proof, when it doesn't appear to exist?
I don't see any proof that there won't be a series 4, either, it may have different characters in it, but it's a pretty successful show, as you can see from the amount of CGI's used. People might not think that the CGI stuff is good, but it's expensive, and they don't balk from using it. You don't spend money on a show which is not doing well.