Why is Tyre Still Here When God Said it Would Sink Under the Waves?

[Searching4truth]

even though apparently no matter your past transgressions, as long as you repent and accept Jesus into your heart, you can see heaven

That's what scripture seems to say, three times. It's the one "unforgivable sin".

But if the Trinity exists and they all are one then wouldn't that mean if you reject one, you reject them all? It says if you reject the Son you can be forgiven but if you reject the Holy Spirit, that's unforgivable but the only way to salvation is through the Son. But they are all three in one... I don't understand.