2012 Citroen C1 my lights wont turn off, ive tried everything and im scared battery will be dead.

You will need to identify exactly what lights are on . Is it just front DLR lights , side / tail , headlights ? Then you can try pulling the fuse and see if anything clears or resets . Check your owners handbook on accessing fuses

Fuse Layout Citroën C1 2005-2013
Instrument panel
These are located on each side of the instrument panel under the trim.


Instrument panel fuse box diagram: Citroen C1 (2012)

Assignment of the fuses in the Instrument panel (2012)
№ Rating (A) Functions
1 10 Brake lamps - ABS - Electronic gearbox
2 25 Central locking/unlocking - Remote control
3 20 Rear screen demisting
4 7.5 Rear lamps - Number plate lamps - Instrument panel - Screen - headlamp adjustment - LED daytime running lamps - Sidelamps
5 7.5 Diagnostic socket
6 7.5 Electronic gearbox - Rear foglamp - ESP - LED daytime running lamps - Instrument panel - Rev counter
7 - Not used
8 7.5 ABS/ESP - Power steering - Fan assembly
9 10 Reversing lamps - Central locking/unlocking - Electric windows - Rear screen demisting - Speedometer -Air conditioning - Heating - Rev counter - Remote control
10 20 Front and rear wipers and screenwash
11 15 Audio equipment -12 V socket (120 W max)
12 7.5 Heated rear screen - ABS - Fan assembly - Front and rear wipers and screenwash - Power steering - Central locking/unlocking - Air conditioning - Heating - Electric windows - Speedometer - Rev counter - Remote control -Reversing lamp
13 15 Airbag - Fuel injection system - Electronic gearbox - Instrument panel - Rev counter - LED daytime running lamps
14 7.5 Air conditioning - Heating
15* 40 Audio system -12 V socket - Front and rear wipers - Power steering - ABS/ESP - Cooling fan assembly
16* 30 Electric windows
17* 40 Air conditioning - Heating
* Fuses located behind the instrument panel. To change them, contact a CITROËN dealer or a qualified workshop.
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Engine compartment
Under-hood fuse box diagram: Citroen C1 (2012)

Assignment of the fuses in the Engine compartment (2012)
№ Rating (A) Functions
1 5 LED daytime running lamps
2 20 Front foglamps
3 10 Left hand front lamp
4 10 Right hand front lamp
5 7.5 Electronic gearbox - Fuel injection system
6 7.5 Electronic gearbox - Fuel injection system
7 30 LED daytime running lamps - Front foglamps
8 25 ABS
8 30 ABS/ESP (with VSC)
9 30 Starter motor - Heated rear screen - ABS - Cooling fan assembly - Front and rear wipers and screenwash - Power steering - Central locking/unlocking - Air conditioning - Heating - Electric windows - Speedometer - Rev counter - Remote control - Reversing lamp - Airbag - Fuel injection system - Electronic gearbox - Instrument panel - LED daytime running lamps
10 10 Hazard warning lamps - Instrument panel - Rev counter - Direction indicators
11 20 Left hand front lamp - Right hand front lamp
12 15 Courtesy lamp - Speedometer - Audio system- Instrument panel - Rev counter
13 15 Fuel injection system - Cooling fan assembly
14 10 Horn
15 7.5 Replacement fuse
16 10 Replacement fuse
17 15 Replacement fuse
18 50 Electronic gearbox
19 30/40 Cooling fan assembly
20 40 ABS
20 50 ABS/ESP (with VSC)
21 50 Power steering

This may help ,

https://www.youtube.com/watch?v=D3rEn1oPlJY

Or worse scenario , disconnect battery lead .