We took my mom's car to service about 2-3 weeks a...

We took my mom's car to service about 2-3 weeks ago because her battery light kept coming on and off. We told them that it was the alternator not working properly and that it needed to be changed. For granted the battery was only 1 year old. It shouldn't have gone out that soon.
After we dropped off the car, we get a call saying it was just the battery that had died.
Okay! So we went ahead and replaced the battery and other minor maintenance that needed to be done causing us $800.
Just 2 days ago, my mom's car died on the road because the alternator had finally gave out. We didn't take it back because we was not gonna spend another $800 again on something that we told them was the cause from the beginning.
We ended up changing the alternator ourselves.
After we changed the alternator, the battery voltage read correctly, and the light disappeared. I don't think they will be receiving my mom' service again.
This place used to be great 4-5 years ago. Now they just don't care anymore. All they care for is making money.