Sorry for the late reply. I have only just noticed that you had replied. I need to check something before i move to attempt rectification as suggested. When the switches are not working they do not actually feel like a switch. they seem to seize in to a solid feel.
Is this something that an audi specialist has to carry out as the manual says that the drivers airbag has to be removed to access the paddle fixings. Following the removal of the drivers air bag will the ECU need reprogramming/resetting.