Is this thing worth fixing? **not car savy**

Hello,

I purchased a 2008 VW Jetta in August 2018 and 2 weeks later the steering
wheel light came on. A loud dinging sound was made, the steering wheel is
very hard to turn at this point and the car barely accelerates. When I stopped
the car it would not start again. A local mechanic told me it was the alternator
draining the battery and replaced both for about $600. The same problem
arose in October and I'm still dealing with it.

I can get the battery charged and it drives again, but only for a 30-40 mile
drive before the same problem shows up. When I went back to the mechanic
he refused to honor his work and swears that it's the electrical system which
is beyond his repair skills. I've had 3 more mechanics look at it and they
think the alternator is bad. I cannot afford the VW dealership since they want
$1,100 to replace the alternator. I only paid $2,500 for this car. Is it worth
putting another $600 into this car for another alternator?