Wasnt consulted to authorise repair costs

I asked my insurance to send the car to Kempton Park Bosch, but they sent it to Pomona because the agent picked up that address. I then asked the insurance for the car to be moved to Kempton Park which is easier as it's in town for me. I was told I had to pay a release fee as they had diagnosed the car. I decided to let fix the car, BIG MISTAKE.<br> On 18 June 2015 I spoke to the guy Peter and he told me that they've found the noise from the engine and it was an alternator pulley. He told me it will cost around R1100 and then the labour will be about two hours to strip and replace. He said I should budget for R2500. I agreed to this and he said he will send me an sms which I should reply with my email to get a quote. We agreed on this and he said it will be by end of day which didn't happen. I called the following day and got his cell and sent my email address but still nothing. While they were dealing with my motorplan insurance they sent me the invoice which was for R5096.91.<br> They didn't contact to authorise the extra repairs. They replaced things without consulting me. When I complained, actually the guy blamed me.<br> I WILL NEVER USE THIS COMPANY IN MY LIFE AGAIN. STAY AWAY.