Q: Can I still downgrade to iOS 7?

No. Not supported.

How exactly did Apple update your phone without you clicking "Download and Update"??

Jayda0799 wrote:

 

Is there any program or jailbreak or website to downgrade?

You would really come to an Apple hosted site and ask this question? Unauthorized modification of iOS can cause security vulnerabilities, instability, shortened battery life, and other issu…

im aksing same question, it ruined my phone

And you get the same answer. It is not supported, you cannot do it. If you provide some information about your device, then someone might be able to help you troubleshoot your problem.