Speed issues with a Samsung Digimax 360

There's nothing to fix. These numbers aren't showing up on the picture itself, are they? The camera is simply telling you the aperture and shutter speed for the current picture (f/2.8 and 1/30 of a second).

The ISO setting controls the sensitivity of the image sensor, analogous to the film speed in analog photography. The more sensitive the sensor, the less light is needed, allowing for faster shutter speed and/or smaller aperture. The downside is that by making the sensor more sensitive, it's more susceptible to "noise," making the picture look "grainier," just like with faster film.

Use a tripod or set your camera to a higher shutter speed.

Turn the mode dial to "A". Turn the jog dial to change the aperture and the camera will change the shutter speed to match. You can also go to the manual mode, where you have to set both the aperture and shutter speed.
Full details are in the "How to use the APERTURE PRIORITY mode" section of the manual (page 22 in my copy). If you need a copy of the manual, you may download one here.

It's telling you what lens opening and shutter speed the camera has chosen.

Hello,
If you want to use your camera manually. Then you should switch the MODE DIAL button(The top cylinderic button) to M position.
Then, by using the other buttons (firstly use arrow buttons) you may change the shutter speed.

Regards.

Select Manual mode by turning the mode dial to M. Press the +/- button, then up/down to change the aperture or right/left to change the shutter speed.

This is on page 14 of my copy of the manual.

Sounds like you are set to manual exposure(aperture or shutter speed) control.

Return it to an automatic setting,

You can download the manual from
http://www.samsung.com/us/support/downloads/SAMSUNG%20S630

replace the LCD