What should I do if I ask for a refund again if I sell my cell phone secondhand through a personal transaction?

I sold my cell phone second-hand through a personal transaction.

They want to get a refund again because the buyer changed his mind.

What should I do if I make this request?

Do I need a refund?

Or can I ignore it because it's a simple change of mind?

1080 2017-04-26 Gentleman

popular How can I connect to watch a video on my phone on TV?

popular What are the side effects of oats?

popular Why does it say that your license has expired on your phone?

popular What is the nationality of Minnie?

popular How can I resolve TLS security configuration errors?

Same Tag How do you usually pay for delivery when you sell used items?

Same Tag Is there an app that measures the temperature of the cell phone?

Same Tag How can I back up my phone number when I use Galaxy s8?

Same Tag Is there an app that reduces smartphone usage time?

Same Tag Is there a way to put on a cell phone screen protection film neatly?

Same Time Can I go on a diet with an indoor bike?

Same Time What should I do if I ask for a refund again if I sell my cell phone secondhand through a personal transaction?

Same Time If I want to enter a specific folder in Windows 10, do I need to know the password to make it possible?