Help/Support Issue with jailbreak 10.3.1

[Deathslav 3 iPhone X 13.5 Donor]

Its only been a short time since I last commented regarding my jailbreak experience and I thought its was time to advance and I purchased an iPhone 6, to remove my safety net of a 10.3.3 restore with an iPhone 5

OMG WHAT WAS I THINKING !!!!

My jailbreak has not lasted 2 days on my iPhone 6 I have installed a paid tweak and Ive lost cydia, all icons  including settings and no way I'm aware to activate  turn off my iPhone

I do have a a backup on iTunes but without being able to turn off find my phone I'm a bit  lost.

Could somebody  please help me to restore my jailbreak with funbox terminal. i don't know yet how to use it and i just don't want to stuff it up, everything i touch turns to,.., well,  anyway please someone

[Equinox1de 16 iPad Mini 3 10.3.3]

To manually reboot your iphone, simultaneously press and hold Power button + Home button. Your device should restart

[Deathslav 3 iPhone X 13.5 Donor]

I have a major problem I have now half a jailbreak no cydia mterminal works to a point I can't install eraser filza works omg can someone help please