garage repair

[gdd40456]

hi i have a kia Sedona i had my car picked up as the fuel pump went. they had a look and said it would cost £600 then they told me two fuel injectors went that was another £200. then he said he fixed it took it for a drive it went well then the car conked out. he said it was something with the electrics. he told me after i rang him that he took it to another garage and left it their so they could check it out they could not find the problem then he took my car to kia so they can check for the problem thought they had to ask me first. can i refuse to pay him for taking it to these two garages. i did not ask him to take them their