Plugin Crashed Website

Hi there,
Need Help SOS…
While doing some customization I added a plugin and suddenly the sire got crashed. I got it and removed the plugin in cPanel, later on I renamed the plugin folder (I watched many video’s on youtube). The problem must be resolved as It was a plugin but the problem still exists and I tried every possible way to recover it. Although, I have a backup but after backing up the site I do so many changing and lot of customization that I don’t want to lost.
I just need to recover the site as It was before. Need HELP Please.

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