What could be wrong with my car & how much should I expect the repair to cost?

What is your question?

Last weekend, I noticed that my hybrid battery was not charging when I stepped on the brake. The car was also hesitating a bit when I would accelerate. I thought it might have been bad gas because as soon as I refueled it stopped, & my battery was charging again. A week later, I noticed that the car had again stopped charging the battery, & later that day, my car stalled out, "Stop car safely" was displayed on the message center, which according to the manual indicates hybrid component failure. I was able to restart the car & I brought it to Drum Hill Ford in Lowell, MA, which was luckily 0.5mi away. They haven't returned my call yet about my car- this is not the dealership I bought the car from & I'm not sure if they have mechanics certified to work on hybrids. I just would like to have a little heads up about what this repair might entail. Thank you.