Worst Car Tech ever

<p>In Desember 2016 we took our car for a dyno tune. After spending the whole day they couldn't fix the car and made us pay for the service anyway and told us to come back another time, after we had the car at our local auto electrician to see if he can find faults. Who makes you pay for a service that they couldn't deliver? So we took the car to our local auto electrician and he couldn't find any faults. I phoned them on the 2nd of June 2017, telling them we won't be able to bring the car back, as it is really out of our way and we already fixed the problem at other car Tech's. I kindly asked if they would be able to give us a refund and he had no problem at all. I had to send through the invoice so they can just check for a proof of payment. I did send it through and confirmed that it was received on Monday, 05/06/2017. Since then I have phoned almost everyday asking to speak to the owner or manager, but the owner is never available to talk to, neither will be ever return my calls so that we can resolve this matter. Please will anyone assist me in this? Kind regards Monique</p>