I'm sorry to hear that Rich.
I'm sure it wasn't you. (custie story sounds fishy)
She hasn't paid you, leave it a few weeks and send invoice for payment, they won't pay.
Then don't go back.
All you have to worry about then is it going to small claims court probably might end up paying something towards it then.
If your sure it wasn't you, so just write down as much as you can remember, date time started and finished, seeing football etc.
Good luck.
Ps. must be quite loud if roof pane shatters, you would have heard it wouldn't you?