Extremely frustrating warranty service

I bought the Xbox Series X just after it was launched and nearly a year later, about a month before my 1 year warranty expired my right trigger button of my controller started sticking which is apparently a common problem. I then logged the exchange and within 2 weeks it was replaced with what I presume was a refurbished controller which after a few weeks also started to develop the same problem but bearable so I just left it like that. Now just 2 months after it was exchanged the LB button also started sticking and now none of the buttons or sticks work at all. Went on to there website and put in the serial number and it says they cant help me because the warranty is expired but the controller was replaced about 2 months ago and is still in a brand new condition because I take good care of it and its always in its protective skin. I phoned the call center to try and explain the situation to a person but the automated services will only allow you to request a link to chat to a bot which will only allow you to request a call back after answering a few questions and then when you put your phone number in you just get a "something went wrong" error message which is extremely frustrating. I need someone to contact me asap to sort this out please.