Please advice Vauxhall zarfria

Good evening to all I am having problems with my 64 plate Vauxhall Zafira petrol 14 petrol automatic. Last week it went into limp mode and engine stalled. It eventually started and I drove it home . The core It was the pack was the issue then two days later it started to play up again I got a friend to put he’s fault code Machine onto the car and 9 fault codes came up regarding low power going into battery. Clear codes and I bought new alternator A new battery and know car doesn’t start . I called r a c out and he couldn’t repair it start it he suggested it was a sensor I have replaced senor and still doesn’t start I am running out of ideas and cash the car only done 43,000 miles. Can anyone advise me much appreciated.