I have an active claim that is in its 4th week and I have no contact with Iwyze and neither do they communicate with me

I have an active claim that is in its 4th week and I have no contact with Iwyze and neither do they communicate with me. I have Iwyze app that has a function to click "follow up on my claim" but it does not work, it always has an error message. Also on the app, there is a section to request a call back. when I enter my details, I have to wait almost 48 hours before someone actually speaks to me. I have escalated my claim "supposedly"4 times and yet it is still not finalised. I have called the call centre number, and clicked to follow up on a claim, and there is only one department the car claims department, I can't speak to anyone or be transferred to deal with my claim as it is building or house claim. Therefore I have no means of communicating with Iwyze, I have tried everything. I have advised them of this and still nothing has been done to improve the service.