MacBook Trackpad Gives Electric Shocks – Hardware Safety Tips

I have perused the entire web to see if anyone has had a similar problem with his/her MB but it seems this is an extremely isolated case that myself alone is experiencing. I bought a refurbished 2015 MacBook pro (straight from an online Apple store) in July 2016. On the day it was delivered, it got a kernel panic. I immediately thought it would be a good idea to return the computer but I was too busy and needed a computer so bad and most importantly, I bought the computer in Japan and the language barriers helped a little in making the regrettable decision of not returning the computer. Over the past two years of using the computer, I have noticed a few minor glitches that I mostly decided to ignore. This include for example:

• Occasional kernel panic when I am compiling large projects
  Kernel attacks when I open many chrome tabs
• Sound distortion when I listen to music on my Windows 10 Bootcamp partition. If this happens, and if I do not turn off the computer, I eventually get a blue screen of death on windows
• Many other glitches (Persistent beachball, slowness, unresponsive app, etc..) that I, unfortunately, ignored until my AppleCare plan expires.

The above glitches are nothing compared to what I have been experiencing recently, however. My MacBook's trackbar is giving me electric shocks! Yeah! At first, I thought that maybe my fingers were tired and that I needed to take a break. But this has continued ever since. The electric shocks themselves are not too serious (and sporadic). However, after some time of usage, I feel the burn it gives me and it quickly accumulates over time. It's so strange and hard to explain. I tried to explain this to an apple shop employee but they, unfortunately, could not help because I either could not explain the problem well enough (language barrier) or, as I suspect, because they have never heard of the problem and that the electric shock burns are only felt after a period of use (something like 30 minutes to an hour), thus, did not have enough time to actually test it themselves. Facing this challenge, I turn to the community to ask what are my options to have this problem solved:

• Has anyone ever experienced a similar problem?
• Is my MB turning slowly into an explosive Galaxy Note 7?
• Is there any way I can contact Apple (English support and without requiring AppleCare plan) to help me solve this problem? Or, should I conclude that I am just screwed and, as my friends often joke, switch to a Dell XPS 13?
• And most importantly, what is the likelihood that this thing will one day decide to go ballistic and blast like a Galaxy Note 7?