Regarding wifi, can you describe what you see when trying to re-enable it?
By the description is sounds like you have performed the steps we would first recommend. By multiple resets do you mean reboots? Or have you tried factory resetting the panel?
Enter Settings > Advanced Settings > dealer code (default is 2222) > Installation > Dealer Settings > Master Reset.
This would require relearning sensors as it will clear the panel and restore it to default value. However, after this you should be able to connect to wifi and run a firmware update. Update to 4.4.1 via the steps here: