What went wrong the last few months?

I had no trouble with deliveries for years, until the last 3 months. First it was that the script wasn't loaded on their side, next month it was that the claim had trouble and now this month I have no news. Even with me phoning them the deliveries are a few days late. I asked for the deliveries to be done a week early so there is an overlap and I don't sit without medication and I was told they will do that. Nothing and now it is late again.