How to unlock iPhone locked to owner?

If you see a "Locked To Owner" message, one referring to iCloud locked, or activation locked:

Take it back to the person from whom you received it. Get them to do the things in this support article or ask for a refund --> What to do before you sell, give away, or trade in your iPhone or iPad - Apple Support There is no way to discover the owner of a device unless they left a message to display on the device when it is turned on, or the person who gave you the device knows them.

Read this article about removing Activation Lock --> How to remove Activation Lock - Apple Support Unless you have the account information that set the lock, the original receipt from Apple, or can demonstrate legal inheritance from a deceased owner, you cannot remove the lock; recycle the device.

From the very bottom of Apple Trade In - Apple :

"Does Apple offer recycling?

Yes. Apple Trade In lets you recycle any Apple device (including devices from Apple-owned brands) at any Apple Store and on Apple for free. That includes your batteries and old electronic products as well as free, on-demand packaging recycling for our commercial, education, and institutional customers. When we receive your device, it will be thoroughly inspected to determine if components can be recycled or reused. Whether recycled or reused, all activities relating to the processing of your device will be managed in an environmentally responsible way."

If you purchased a locked Apple device from someone, you have to watch out for Activation Lock. This is known as buyer beware, if you purchase used Apple devices, you must make sure its not Activation Locked, or else the device is practically useless.

Next time, make sure you verify that they are a trusted seller and can verify that the device is not Activation Locked. It’s not worth your hard worked money to risk buying resell Apple products. Unfortunately, I think you got scammed this time.

Read this user tip about resell used Apple Products and the risks: The All Too Common SAD Reality of Buying … - Apple Community

There is no way to bypass it.

U should ask the seller got a refund but there is a way to bypass it

Yes there is but I'm not sure if I can write it here

If you think you know of one: Report a security or privacy vulnerability - Apple Support