Useless service from them

My Bakkie went in cause the Diesel ECU Controller got damaged by rain or water they charge me R7000 to fix it I asked them if the can get it sorted out the Bakkie was there since Monday the 13th of November 2017 the Wednesday I told them to go ahead and fix my Bakkie he Nico said the Bakkie will be fixed by Thursday afternoon and i can get my Bakkie before the weekend and it's now the Friday still don't have my Bakkie back I even phoned around to get a ECU controller and I found it but they refused to do it today and will only attend to my bakkie next week Monday I'm without a vehicle and this is unacceptable