Hi,
Please use following css code.
body { overflow-x: hidden}
For the slider issue, you should make your slider. You can not use our slider in your wesite.
We can not support slider issue
And for the 2nd issue( It is Image gallery issue), I can see you changed layout in content.
So you can make it responsive using css code.
Best Regards,
Hey, similar kind of problem to my colleague faced who happens to be a professional ghostwriter UK at the leading writing company in London. Well if you give me some time. I can ask on your behalf how he fixed the problem.