Big mistake and website down

Hi,
Sorry for my english, I’m a frenchboy.
I have installed last day your great plugin and installed it.
After 2 days of problem, I uninstalled with your FAQ, your plugin.
But now, my frontoffice and my back ofice are down, I can’t acces to the administration office.
When i try to connected at my website, i see at left the https but it is indicate :

The page https://www.monsite.com does not work

https://Www.monsite.com has redirected you to too many times.

I have you plugin when I connected my FTP.

I’m lost…

Thanks in advance