Landrover Discovery conversion - Complete failure

We were quoted for a conversion - Landrover discovery conversion to a Lexus V8 engine. What a complete nightmare. Our car was destroyed by this knock shop. They guaranteed that the only feature that would not work is the cruise control. The car is not useable - it dies for no apparent reason. It drains the battery because the electronics' has been completely messed up. We paid them R90 000.00 for this conversion and I would not even give them one star if it was possible. Back yard mechanics that should be avoided at all costs!!!!!!!!