NHTSA Complaint #11446016 — 2013 KIA SOUL

It all started when I thought I received bad gas a couple of months ago after filling my tank up with regular gas from a Speedway , It didn't start right away, and that never happened and then it continued to Be hard to accelerate, as I drove it. That has happened on 2 other occasions since that incident a couple of months ago I would push the pedal to the floor and the RPM would not move it stayed on zero. The accelerator was resistant to move, but I made it home. Spoke a mechanic friend, who's done body work on my car, and thought, as I did, I had bad gas.. suggested, I get the fuel tank flushed and filled, which I did at Jiffy Lube. I've since put HEET in on every fill up, and used premium gas. Happened again yesterday am on my way home from work about about 830am. I was stopped at a light, it cut off, I put it in park, and cut it back on, but it was hard to accelerate. I made it home, but now extremely worried, given all the spontaneous fires, and engine problems. It's my only source of transportation, so I'm in desperate need of help.