Q: Stiff steering wheel, Battery Light flashing, and noise under hood.

I recently had the timing belt replaced and it damage the valves when it broke so I paid $2,400 I've had my car back 2 weeks I've been noticing some slight noise under the hood for the last day or so today I was driving when I push on the gas the noise was so loud like grinding and then I check the fluids the power steering fluid was low I added at the noise stop for a minute and then I started driving the battery light was flashing on and off the steering wheel became so hard I could barely turn the car and there's a rattling noise coming from under the engine this is 2 weeks after paying $2,400 to have my car fixed what is really going on?? Is any of this due to the fact of the repairs that they just made could they have done it wrong and this is why all this is happening?? Plus I notice that the idol is a little higher than my car was before the timing belt broke and all these things happen is that normal or did they do a poor job of repairing and charged me up the ass?

My car has 111000 miles.
My car has an automatic transmission.