Ford fusion 2013 radio won't turn on?

I got a jump the other day cause i left my lights on. When i jumped it the radio/AC won't turn on. I'm stuck on the black screen with only the date n time. Took it to fir
Ford, they unplugged the positive from the battery and put it back on. Still didn't work, said they don't know the problem. What the hell ford? I need the AC because winter is coming n i need to defrost the car. This is a big issue. If anyone knows anything please help. I need this fixed as soon as possible.

I recommend contacting our Customer Relationship Center at 1-800-392-3673. Hours of operation are 8:00 a.m. - 8:00 p.m. EST (Monday-Friday) and 9:00 a.m. - 5:30 p.m. EST (Saturday). They'll be happy to assist and get you connected with a customer service manager for your region. The CSM will work directly with the dealer to reach a resolution.

Have a great day!