My husband sent me a text message saying he is giving me divorce. It was a very clear message that there won't be any contact from now. I confirmed the receipt by replying be happy. Now my question is, Is this divorce final or was he suppose to do more. Please answer as soon as possible.
"I'm giving you divorce," etc. This statement won't constitute a valid divorce as it is merely a promise or a warning and promises and warning do not effect Talaq. However, if he said "....I divorce you" instead then one Talaq would occur. So in your case Talaq has not occurred and your Nikah is still intact.
بخلافه قوله سأطلق طلاق كنم لانه استقبال فلم يكن تحقيقا بالتشكيك
(الفتاوى العالمكيرية ج.1 ص.384, كتاب الطلاق, رشيدية)