Hello PVR, We understand the concern of the Flip 5 not fully opening. We recommend the following for the phone not opening, check for possible dust and debris. You can also try cleaning the phone: https://www.samsung.com/us/support/answer/ANS00086342
If these steps do not help, it is recommended to have the phone serviced. You can use the following link to find a list of service centers in the U.S. that can do the repair: http://www.samsung.com/us/support/service/location or by contacting customer support at 1-800-726-7864.
For assistance outside the U.S., please use this link: https://www.samsung.com/us/common/visitlocationsite.html