how to cleanse my colon?

I have stomach acid refulx, also I have lots of gas. I get constipated easily. I’ve been taking one spoon of organic coconut oil, which helps me have bowel movement everyday. someone told me to stop having all that gas, which beeno and gax-x don’t work, better to have my colon cleansed. what is a way wich is easy and doesn’t make me go through hell? thanks.