Alternator/generator/regulator problems of the 1997 Hyundai Sonata

After attempting to call Hyundai, I am absolutely fed up with everything they are doing. I have "repaired" my vehicle on numerous occasions to no avail. After at least 5, definitely more, trips to the mechanic I have repaired the alternator twice, the idle air control valve, brakes, motor mounts, done a transmission fluid change, and have had to repair 2 flywheels in the transmission. That list does not include the general maintenance of plugs, filters, and oil. I can't deal with this anymore. This is not actually my vehicle, this is my mothers vehicle, but regardless of who's vehicle it is, this is not acceptable. What it basically is doing is when it reaches a certain mileage it will basically "kick/jerk/push forward" (for a lack of terms) when it reaches 12 mph and 32 mph and I'm certain of others but my mother virtually never drives above 45 mph so anything above that I'm uncertain of. It also has a very hard time accelerating to 20 mph. Once it's above 20 mph it's easy and accelerates very fast. My mother has nearly been hit twice due to this inability to accelerate as fast as it should. I have taken it too Hyundai and they refused to look at the vehicle saying it is out of warranty, so I took it too numerous different mechanics. I am getting 3 different answers, something in the fuel/air line, engine computer module, and transmission. I do not want to have to pay for any of these repairs so I haven't done any of them, but I am thinking that this definitely needs to be reported. There are transmission and electrical items being reported which may be related to this. If this is as numerous as I'm seeing on here, you may want to issue a recall on this vehicle. Once is a coincidence, 5 times is phenomena, but over 20 times is an explicit failure by the company, no matter if the vehicle is 30 days old or 30 years old.