Fuck them!
Around two years ago I have tried to contact their support and repair my controller through Microsoft. I had to create an account, use their web chat for hours, PROVE that I own said controller, send the controller serial code, provide my phone number, email, etc. After around an hour of chatting with their support their webpage has crashed for me. After that it has connected me to a new person who was asking the same questions. I have told them to search for my last chat, and after 5-10mins they have told me that my Xbox one controller is too old, and they don't repair them anymore. It was literally the first question they've asked, why couldn't they tell me that they won't repair it straight away? Fuck them