Unfortunately addicts lie continuously even when confronted with evidence then when they can’t lie anymore they down play it or pass the blame.
That’s a good idea about paying over the phone that way she can’t throw it in your face that they couldn’t go.
It’s an awful time but having gone through it myself I can say it does get better but for that to happen you need to step out and refuse to play a part of it anymore.
Good luck with everything.