How to remove text ads from WP blog

When we view our website, https://www.kiana.com, on an iPhone, we see the following text over the website: Called an asset offered online is usually work online payday loans online payday loans and shut the very basic. Sometimes careers can immediately begin to cash advances online cash advances online meet our simple criteria. Bank loans low risk to seize the payday loans payday loans right on their staff members.

We also see this when we share a blog post – how do we fix this? When we did a google search with the above text, we see that many other websites have the same ad text – please help!

Julie