Tm group interview questions

Straight forward, 3 stages. In total I spoke to 5 people. This was for a senior developer position, each stage, I've mentioned my lack of AWS experience but experience in Azure as was highlighted on my CV too, but was welcomed at each stage of the process. Last stage, code review - super simple, not really senior level exercise. Same interview, I'm told that there are a few "architecture/infrastructure" related questions - these are "bonus" questions, again not hard but no AWS experience. In total, I've spent approximately 3 hours doing interviews for TM Group only to be told "AWS is a key requirement for this role". Totally unjustified, dragging me through this interview process despite my full transparency start to finish.