Make this polite:
"So you know why I am angry with you, you are absolving yourself of any responsibility because according to you, it is MY fault YOU didn’t phone me when I was ill. You are completely faultless and not remorseful, as usual. And then you proceed by turning this around on me by discussing something completely unrelated. So basically everything is my fault. Got it! There is no point talking about anything else because you think you’re an angel."