Terrible after Service

Vehicle in accident 5th Dec 2017, great response from Discovery insure, vehicle been towed to Action House for Assessment and repaired, on collection of vehicle at panel beaters, I noticed fuel light flashing, fuel missing, made it 100 meters out of panel beater shop, vehicle ran out of fuel, after getting fuel in vehicle, battery is dead. Emailed Claims Administrator Tshegofatso Madibo, no response, also phoned, no response. Phoned Discovery call centre on 23 Jan 2018, received message, lines congested and phone went dead, phoned call centre on 24th Jan 2018, managed to speak to a call taker, explained to him fuel ****** and seat covers ******, while vehicle in storage with service providers, booking sheet at Action House indicates fuel level half tank, on assessment fuel missing, call taker put me on hold for 30 min, listening to music, almost put phone down and he responded to inform me that they are investigating the matter and will get back to me, after service is terrible and the fact that fuel are drained from vehicle is a concern, with seat covers missing, I feel that the service providers must be trustworthy and reliable as it will reflect back to Discovery Insure.