my account is de-activated but why

Did you re-read the TERMS of agreement?

https://helpx.adobe.com/stock/contributor/help/submission-guidelines.html

Deactivation is usually for suspicious account activity.
1) Unusual sales or refunds.
2) Unauthorized use of protected Brand Names in keywords/descriptions.
3) Content spamming. Using multiple accounts to artificially boost sales or bypass submission limits.
4) Complaints / 'Take Down Notices' from 3rd parties.
5) Other violations of Stock Contributor Terms. 

This matter is solely between you and Adobe Stock, not fellow Contributors in this user-to-user community.

Work on other projects. Submit to other services. That's all you can do.

Best of luck.

It would be nice if Adobe provided more detail regarding their final decision to close an account, however it's my understanding that they rarely do so.  I think perhaps there are just so many accounts and so many violations of T&C's that they're just unable to keep up with it.

Ther is an official appealing process. How to Report (and Appeal) | Adobe Transparency Center. Fair or not, you agreed on the terms when you created your account.