My alarm wall panel needs attention l change internet providers and now it refuse to connect
Did you get a new router? If so, the panel would need to be connected to the new wifi network through that new router.
Settings > Advanced Settings > Wifi. Choose your new wifi network and enter the network key.
If you have already changed the wifi on the panel, many routers can cause an issue with connecting due to the PMF setting being mismatched between the panel and router.
Try toggling that PMF setting on your panel under Advanced Wifi Settings on the bottom of the wifi page. Does that resolve the issue?