Hello orris,
Thank you for reaching out and sharing your feedback about your Samsung refrigerator. I understand you're having issues with your refrigerator as the back of the fridge has frozen over and after less than 6 months or repair it started happening again and now you want to get a refund We do apologize for the inconvenience this has caused you. We are here to help.
To help you with, I am providing this link https://www.samsung.com/us/support/troubleshooting/TSG01109344/ to know more about the specifications of your provider. Just click on "Frost in the freezer or refrigerator", for the troubleshooting steps.
If repair is needed, please take note of this link https://www.samsung.com/us/support/service/warranty/RF260BEAESR/AA for the warranty coverage of your microwave.
Should you need more assistance, please feel free to get back to us via the following options:
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
Your reference number is 1144569655.
-Noraina