Trying to instal affilaite code

Hi

I’m creating a holiday site and wish to add some affiliate links on the pages. However there seems to be some inbuilt table coding that I can’t see as the alignment of the affilate boxes gets thrown out.

Is there a CSS file that is automatically adding tables in the content?

The page in question is https://www.thailandtravelcentre.com/flights-2/

I know it’s not the code as I’ve installed it on a different site using a different template and it works fine.

Thanks
Taryn