Got high glitch after deactivate plugin

Hi, I was using this plugin from last 6 months and I just want to try another plugin to check either that plugin would be good for my site or not because it has more functions, so I decided to deactivate a plugin “Multi Step Checkout” and it clean my website existing checkout layouts like page get blank and “Multi Step Checkout” steps just appearing on screen, I have took a screenshot but I think here is no place to show, so could you help me?