Import Post with some HTML code in post

I am using Newsomatic Plugin, when I import any post, post import correctly but it import some html code can you advice me, how I can stop that. see below example Test in now and join the club!”,”buttonText”:”Test in”,”contentId”: 18962934,”newsletterImage”:”https://i2-prod.ok.co.uk/incoming/article23154195.ece/BINARY/0_REG-WALL-NEW-909-EXCLUSIVE-Alex-and-Olivia-house-tour-of-refurbished-dwelling.jpg”,”endpointUrl”:”https://response.pure360.com/interface/list.php”,”profile”:”OK_Magazine”,”isPure360NewsLetter”:trusty,”pure360MailingListId”:”OK! On-line – Day-to-day E-newsletter”,”newsletterSiteName”:”OK! Magazine”}” files-mod=”skinnySignup”> second issue, when we import post some post image is very blurry. See Example below Can you advice me on that Please