Faulty Installation

On 9 July we had the DQ system installed into my car via C-track, the technician made the mistake of installing the system on my power steering's power supply and the result was that the power steering and DQ unit was blown. Obviously this was not my fault and approached Discovery to have this sorted asap. The car was towed in and was left without a car for a day and go a Avis car the next day and the part was ordered a week later and finished the week after that 30 July the car was fixed and Peugeot requested invoicing information that was only given the next day and since then my Car is standing at Peugeot and got the mail that storage would be charged and still no reply from Discovery or C-track