Help, No Heat & ICE is running hot

[Gregtek]

Hello, we just purchased a used 2010 Fusion Hybrid with 108k miles. The car was in a slight fender bender front right and had a new fender put on and front clip repainted. The day we bought it we took it to a local mechanic and had him check out the damage to the front end and he verified that it was minor with no damage to the sub frame or anything major, he took it for a quick drive but it was an 85 degree day and I guess we both didn't think to check the heat just made sure the A/C blew cool. On the drive home it was approx 45 min mostly highway and I noticed the temp gauge was running at the very top of the normal curve and called the seller and he suggested we check the coolant. He had admitted to only owning it for a few months prior to us purchasing it. My daughter left early one morning and noticed the heat wasn't getting even warm. I thought it might be a blend door or something but it appears as though there is complete movement and the A/C doesn't come on when we turn it from say 60 degrees to 90 degrees or anywhere in the warm zone. It is a fully loaded model with the touch screen and computerized HVAC controls if that matters. A few days later my daughter was driving on the highway doing approx 70 mph and the high temp came on so she pulled over and noticed that the EV motor coolant bottle was extremely low and all we had available was distilled water so we put some in and the next day filled it with 100% Zerex G05. The engine coolant res. was a bit low so we put about 8-10 oz. After filling both res. the temp now rests up in that very high normal curve but still no heat. I am not wanting to take to the dealership just yet but am not sure if there are any local private mechanics that are qualified to work on the Hybrid system. Any help you might offer would be greatly appreciated.