Hi,
I am Bilal, a Network Specialist and Consultant for the past 8 years with experience of designing, implementing, migrating and troubleshooting various types of network (Enterprise, Telco, ISPs).
I just read your project description and shall be able to provide you with all the support required to fulfill your project by restoring your Cisco 3850 Switch back to normal.
Feel free to contact me. :)
Regards
Bilal Salim