To get back to my original
problem which started this thread i.e. that the radio wouldn't allow me to enter the digits as some of the buttons weren't responding.....
I resorted to trying it each time I drove the car, and lo and behold today the buttons were working fine and allowed me to enter the code. There is no rhyme or reason to it, I haven't disconnected the battery since the
problem occurred, it simply decided to work after an extended period of not working.
Perhaps it was just sulking, as it strangely started working again after I took the car out and drove it the way a Cupra should be driven!
So my advice to anyone with a similar
problem, is to take their car for a blast. It may not fix your
problem, but you should feel better