Extending or deleting side bars

While making my website I somehow put in these two big bars on the sides of my page that extend about halfway down but no further. I cant select or delete them and I’ve forgotten how I put them. Is there any way to extend them to the bottom of the page, or if not, anyway way of getting ride of them?

Hi! It looks like your question is not related to coding. I recommend you to contact Wix Customer Care here: Contact Wix