how to fix indicators and full beam?

My peugeot 2006 has a problem, when i indicate left OR right it decides 90% of the time to stop signalling and turns the front lights on. This will also occur when im just driving as well.

To temporally fix the problem, i have to keep wiggling the indicator stick until the dashboard lights turn off to indicate lights have turned off.

I spoke to a peugeot garage and they said straight off its a comms unit fails

other people have suggested it may be an earthing problem as it doesnt happen all the time.

whats the best way ato solve the situation?