Ok, personally, if someone is rude to me, they're just asking to be destroyed and conspired against. Honestly, in Diplomacy, any sort of press is legitimate, of course, some types of press will work better than others... if you want friends...
So you are annoyed that they are being rude to you, but from what I hear, they are also quite annoyed with you, for your "spammy" messages. I don't know what they expect, I would welcome such "spam" because it means an active player, and it's not as if you are FORCED to read it. Diplomacy is about communication, expect to get it, expect to get a lot of it, and expect some of it to be offensive.
Also, Diplomacy players do have the right to ignore other players, they don't HAVE to listen to you, if they tell you to shut up, you don't HAVE to shut up, but they don't have to read your messages. If they have really said shut up, you should probably talk to other people on the board, even if they are three players, there are three other players and yourself to take them on.
Things don't always work out, but if you get humiliated and shocked, they have accomplished what they set out to do. That is, to irrationalize you.
Oh, and for their little situation, I really don't see how Turkey, Austria, AND Italy hope to form a workable alliance... It's logistically impossible for Turkey to win any game without attacking Austria, assuming that Austria doesn't just pen up in his own home centres.