Horn blows and radio comes on its own, heater only blows hot air.

What is your question?

I made the mistake of buying this Ford manufactured 2008 Mazda B4000 truck. Its possesed I swear. Dash warning lights were all coming on, horn randomly blows on its own, radio comes on and off or sticks on randomly, now the heater blows only hot air even with air conditioner on. Local Mazda dealer in Sydney, NS is headless and could not fix the issues. Now my warranty is up and I'm stuck with these problems. Any suggestions?