The 'Cloned' 3186 movement - I find it strange, this movement looks the same as other TD websites.
That is because every other TD offers the same watch - even though for a different price the watch and the movement is the same on all noobs of this version.
What the majority is trying to say is - this movement in particular is known for its unreliability.
When we say you were scammed - we more or less mean that a TD would have offered a free service of the movement/ repair while you would have to pay for the reshipping and take all the risk of the watch being seized on its way back to china.
In the end you can be lucky that you got what you ordered - you just made the wrong decision regarding the movement choice - and that is something you can see as "instructive money" and as a lesson for the next time.
Now you can have the experience and the will to invest time into reading about your favorite watches and their particular rep which fits your preferences the best. It could have been worse than this. So keep your head up.
Servicing the movement is probably not the best thing you can do... maybe have a look at a watch smith that can replace the movement to a 2836 with GMT function - should work since the base of your 3186 clone is a modified 2836 like already said.
only thing he will need is a new movement and probably a new hand set. Otherwise - see it as a bespoken lesson for your life and give one of many TDs a try with a new watch. Would be less complicated.