Mobile Coverage with Orange

You would expect paying £45+ a month would get you a decent amount of network coverage on your mobile. However it seems that Orange decide that they will only give you coverage if you like standing on top of a hill in the pouring rain! It is a bitter disappointment and a rather infuriating one at that. I am pretty sure on those grounds you could instantly terminate your contract on terms of them not fulfilling their side of it. Well no, apparently I would have to pay two hundred pounds just to end it. The fact that I am getting terrible signal and poor service is infuriating to the greatest extremes.
If they were doing what they were meant to I wouldn't lose signal during calls of a business nature. Who do they think they are? It is just incredible that many students and workers are paying out for a service that they aren't fully getting.
The best way to check is to do a little bit opf research, orange have quite a few black areas where network coverage (signal) is minimal. T-mobile seems to get a good reputation as do vodafone. Why on earth can't orange just do a bit more to provide for customers.
However, customer service from them was incredible, calling me back to find out if the service worked out and if they can do anything more for me. A great group of people working for the company, why can't they just work on the coverage service and have happy customers for the reasons they should have. Insanity.