Battery Dead problems of the 2005 Volkswagen Jetta

Started having electrical problems (random dashboard lights, doors, locks, windows wouldn't work, key fob battery died, etc) then I had to replace the battery. Continued electrical issues with new battery, passenger side window/door wouldn't operate or work at all. Needed master key fob to lock driver's side door but all other doors wouldn't lock with fob. Next, I am having issues with the car not starting, put another battery in it. From there random dashboard lights, dinging with drl and first few minutes of operating vehicle, and airbags lights are on. My mechanic sends me to a mechanic shop that specializes in vw. Mechanic replaces window manager and driver side door harness. Still find issues with airbags so I take my car to the dealership in st peters mo during a snow storm. Hand them all my paperwork, they go in and find that my car is being worked on and see that their are splices, connections butted, so they "fix" the airbags and send me on my way. However, I have a toddler in the backseat and she was able to open the doors while the vehicle was in motion, the windows stopped working, etc. Dealership cannot speak to other mechanic shop's work so they did the recalls needed (airbags) and replaced the harness, apparently again. I have all the receipts from the work, all the parts are in my trunk of my car, another appointment to see what the issue is. Car appears to be stuck in security mode but doesn't properly lock, not able to use child lock, and unable to protect vehicle safely with proper locking mechanism. I don't feel safe if there is an intruder or if my toddler were to try this stunt again, also concerned of the fuel issues I've been having. Replaced my gas cap in hopes I wouldn't see loss of fuel, and the car has a slight oil leak that no mechanic can seem to find. Unable to attach paperwork as the dealership has it at this time.