I too agree to leave them alone. If I'm reading the conversion chart correctly, the temps are between 64 and 77 degrees Fahrenheit. A bit on the chilly side for a chilli! Also 5 hours of sunlight is considerably less than what they need. If they are fed and watered, you will still get some fruits, but nothing close to what the plants are capable of. it is also likely they will not be as hot as they could be either. Fish and seaweed emulsion will also work well as a supplement to the nutrients in the soil.

DMF: thank you! Brought back great memories. Definitely ex-plants. Here is a link that might be useful: Dead parrot

Roots can stand a lot of jostling. Get a trowel in the pot and loosen the root ball around the edges. If it's not too root bound, you should be able to tease it out. Not critical yet. Hack that towering stem off when you can. It's not critical to do it right now, but it will make re-potting a lot easier. I would treat the spider mites first. You can pull off the webs with a paper towel then apply insecticidal soap. Read the directions and soak the little buggers. Your watering scheme is working - the plant has gotten this far - so keep at it for now. Try to get it more light. Closer to window and lower so all the leaves get some light. Peppers are tough. It will pull through. Dennis

@the_northeast_chileman, Thank you for your reply! 'So can we assume they're indoors? If yes how much sunlight or artificial light are they getting? What's the temperature?' Yes, the chillies have always been kept indoors and they have always been kept at a room temperature, most of the times on a desk above a PC which runs hot to give it more warmth which for the past months seemed to cause no issues, during the night it does get cold therefore on the worst nights I place it on a heating pad (not a temperature too high, just slightly warm). The only light it receives is the scarce daylight, which in the UK is limited around this time. 'So what did you use?' The soil it has now is the usual 'garden soil' which can be bought in bags with a small amount of compost added to it. It was re-potted to this as the previous soil was simply taken from my back garden and had a very clay-like quality which made it retain the water for too long. 'The growing media in your pix looks very wet to me?' Yes I agree it does look very wet yet the soil is a very dark brown which may make it seem that way, its more of a slightly damp consistency throughout and has been like this for about 5 days without watering, which makes me question if it's simply not getting enough heat to get rid of the water. Once again thank you for replying