The garage fixed it YAY!
but they didn't put the code back into the stereo.
My wife (bless her cotton socks) was struggling, she says the manual is not clear on how to do this.
We know the code - this will not help if you don't know the code.
Lets say the code is 3214
To enter this into the stereo you would press the following keys
1,1,1,2,2,3,4,4,4,4
I.e. press the positional key enough times to get the position to the code number - Position 3 should show number 1 so you only press it once. Position 4 should show number 4 so you press it four times.
When the correct code is shown, press 5 to comitt it to the radio. the radio should now come on. If not then contact your garage, as you may have the wrong code.