On a nice partly cloudy day like the last few, rent/borrow/own a bike and ride to the west entrance of HaiGeng Park via DianChi and GuanJing roads. There is a wonderfully quiet and pretty back road that parallels DianChi if you're up for exploring it out. Go on a weekday and you can even sneak a ride on top of the tourist walkway on GuanJing for some pretty scenery. Once at the park, pay a 10rmb entrance fee and then go have lunch/snacks inside the park. Better yet, is to go as a group and rent a bbq slot or picnic on the grass. The water will most likely be smelly green now, but when it's not, HaiGeng is even nicer. You can ride out of the east exit and explore the nearby sports complex and then make you're way home on XingTi Rd.

The weather and ability to see blue skies is a big reason so many foreigners reside in a tier 2 city of this size. So I like to take advantage of the climate by taking in the pleasant parts of Kunming.

Pulling teeth is much easier, less painful, and possibly less bloody than trying to get cash back from a Chinese merchant.

Try for the 2nd repair. Albeit, they will try to charge you another 200 to 300 rmb for yet another screen/visualizer part. Here you will have to be very demanding and willing to make a scene. Bringing a friend(s) along wouldn't hurt.

If you went to the shop the next day after your faulty repair, you should have a good chance at obtaining a 2nd repair for free. If the problem didn't fully manifest itself till several days later or you waited to complain, then this is much more problematic. Essentially, this now becomes a tug-of-war between how willing you are to make a scene and the Chinese shop owner's obstinacy.

In Shenzhen, the repair shop I frequent for my iPhone would most likely take a 2nd look at it for free. They would repair it without charging me for another expensive part if I start and continue to badger/scream at them they used a crap/wrong part to start with. However, I speak fluent Chinese and have used this shop more than once.

As a practice, I wouldn't have my smartphone or Apple products repaired in Kunming except at an authorized repair shop or the big chains mentioned above. Of course those places all charge considerably more.