Please help with mxq pro 4K box

I am in desperate need of some help with this android box. From what I can find out it was sent to me jailbroken and I believe there’s a build on it. The seller gave me the website where he downloaded the firmware I believe but it’s in Chinese. I recently went back to that website and I just noticed that there’s an update and two other files dated for January 2017. The site is “Baidu Pan”
I accidentally deleted Kodi and when I go to the play store to re-download it I can’t find it. I also had to uninstall updates to the play store because it said it wasn’t compatible with my device. I need to know if I should just do a hard reset and how to do that or if I should just try to re-add Kodi?
I also signed up for IP vanish but before I even accidentally deleted Kodi, I couldn’t figure out how to go into Kody and keep the VPN on. It kept disconnecting. I have all the information on the model number and all of that information in the settings in a couple pictures but I can’t figure out how to post them on the site.
I will provide all the information from the box if needed, someone please help me this is so frustrating and my kids are driving me nuts without TV !!!