Cannot remove priicechop from computer!

Hi,

As it seems many other people have been experiencing, I too cannot get rid of these annoying priicechop ads slowing down my computer and it keeps reinstalling itself as an extension on my browser. I am using Google Chrome. I have deleted pricechop and various derivatives of it from add/remove programs, and scanned and treated with Malwarebytes, but the ads are still coming up! What else can I do?

Many thanks,

Sarah