Hi Leon....welcome to the Club
I'm sure it's not indicative of every dealer offering poor service but in your case I think it's a case of several elements of poor service coming together over a short space of time and although these things happen, it's unfortunate that it has tainted your opinion of Jaguar as a brand.
I wouldn't defend the dealership but I would hope that once things have settled down you will hopefully start to enjoy the pleasure of driving your XE and come round to liking Jaguar once more.
Good to have you onboard
Cheers, Trevor