Welcome. If you took a wet ball of soil and put other soil around it your roots are likely still soaked. If by, "I made some drainage using plastic" you mean you put plastic in the bottom of the pot then that did more harm than good. Did you check the roots when you repotted? If not, you need to pull it out, knock the old soil off and see what you have left for roots. You may find you need a smaller pot instead of a larger one. If the soil used in the repotting was basic store bought stuff you'll need to get some perlite and mix it 50/50 with your soil.

tj

New pot is way too big.
Bad timing for repot, best is late Spring/Summer.
When you repot try to remove as much of the old soil as possible because it could get hydropchobic and while the rest of the soil is wet, around the roots is bone dry. However Pachiras don't mind having a bit of wet feet. Don't let the potting mix dry completely.
You can use artificial light during Winter months.

Your plant is providing you with indications it has an unhappy root system (I looked at the video), and a healthy plant isn't possible unless the roots are happy. FWIW, the overwhelming % of growers who arrive here seeking help are here because of issues related to poor root health/function.

If you can't water your soil to the point where it's fully saturated and at least 15-20% of the total volume of water you applied during the watering process has exited the drain hole, your soil is a limiting factor and you'll be fighting it for control over your plant's health until you get the plant into something more appropriate. Simply adding a large fraction of perlite to an already inappropriate soil is a step in the right direction, but all you end up with is an inappropriate soil with a lot of perlite in it.

Additionally, you have the fact that Feb thru Apr are probably the worst months to consider repotting to work around. The extra soil volume you added is counterproductive at this point (increases the impact of issues related to excess water retention), so I think I would probably remove the recently added soil and return the plant to it's old pot, after inspecting the roots for rot and correcting any issues I discover. Then, I would flush the soil thoroughly and learn how to deal with the excess water retention until mid to late Jun when I would repot into something more appropriate.

There is more to talk about and more specific instructions, but I'll hold on that until I learn whether or not you're interested in following a course that approaches the situation from the plant's POV, which is essentially making sure the things that are most likely to be limiting your plant are fixed.

Al

They nailed it.

These plants love excellent drainage, which is essential to maintaining vitality through the Winter. But you've read the other Threads, and so you are familiar with this advice.

Josh

Thanks guys, just rough times for this plan and for me, I'll get on it and try to go to the store now and get what I need ! keep you posted thanks much!!