Aqualisa quartz Digital shower leaking ?

I have a Aqualisa quartz digital exposed shower unit. This has recently started leaking from behind the body jet assembly from behind both jets? I phoned Aqualisa and they were of no help did not support this item with spares and said it was the main processor which was faulty. There solution was to have a new one installed at a special price of £649.99, usually £925.00.
This because I was an existing customer. Far to much money I feel. Has any body had a similar problem and how did you stop the leak.