Installed and Activated the Plugin & It Broke my Site

Hi,

Yesterday I installed it on my live website, as soon as I activated it website starts throwing Critical error message, in hurry and fear I deleted it directly from Plugins folder from FTP, after then website started giving 500 Erorr, I increased the memory limit to 4000MB, since then it is consuming a very high usage of CPU and RAM, I have dedicated server of 8cpu and 25gb ram, but then also website broke after every hour, all this happened after installing this plugin and directly removing it without deactivating it. Please help.