You wouldn’t need to stop for a hour, most likely a 15 minute top up stop would be enough to get you home. This is perhaps the main reason why I myself didn’t want an EV.
However, you are where your at and its down to what suits you best moving forward:
As others have said, your lack of research and not wanting to charge away from home, would be sufficient reason to terminate the contract without attracting a £250 termination fee.
However, if the car is causing you alot of anxiety, as you have said, that could be good reason to terminate especially if you suffer anxiety anway. Motability would most likely look at this as medical grounds and waive the early termination fee or charge £50, especially if you haven’t had an early termination previously.
The other option is to accept the car doesn’t go as far especially in winter months and earn to do short charging stops on longer journeys. There will be others you can ask for help, as I believe they are a freindly bunch.
If you choose to go for an early termination you will recieve a pro rata refund of the AP you paid. You won’t have to give anything back, unless there is an early termination fee.