Speed 400 -1 year, 12K and countless stalling

I really wanted to call this bike the Stallion 400, but at this point, Stalling 400 feels more accurate. Before the first service (1,000 km), it stalled a total of two times, both in 4th and 5th gear. Annoying, but manageable. But after the first service, things went downhill—now it stalls in all gears right in the middle of the road, even with the clutch fully in. I’ve taken it back for service twice since then, made it very clear that this is a serious issue, and yet, nothing. No fix, no real solution. Just got my second service done a few days ago, and guess what? The stalling has gotten worse. At this point, it’s flat-out unsafe to ride. If anyone else has faced this and found a fix, please let me know. Otherwise, selling it off is starting to feel like the only option.