Lube. Go to a watchsmith or swap.
Since it is a clone of the Swiss ETA 2824 movement, every watchmaker (yes, everyone !!) will theoretically be able to service the movement.
Now the question, do you want a major overhaul which can cost a few hundred?
For my part, I would have a free quote made.
In terms of price, it would be smart to order a replacement movement on Aliexpress, and the watchmaker should then simply replace it. That should come to a maximum of 100.