Hello, @KudzaiS,
Thanks for your contact.
You have to check the responsiveness setting of the slider revolution, please refer to the official documentation of the slider revolution here: https://www.sliderrevolution.com/documentation/responsive-settings/
https://www.sliderrevolution.com/faq/display-different-images-on-different-screen-sizes/
https://www.sliderrevolution.com/manual/checking-to-ensure-modified-content-is-still-responsive/
Regards 8Themes Team.