FED UP WITH SONIC CALLBACK

My chev sonic 1.3 d is in for another call back. I already posted on hello peter for this that im fed up with the constant major call backs but this time it is the duration of the call back. I have a courtesy car now for almost a month after i gave GM my car.<br> <br> In the letter it stated that the replacement of parts will take 12 hours. When i got to the dealer, i had to sign a form notifying me it will take 5 to 8 days. And now, each week i get an sms from bidvest informing me my courtesy car is extended. This is ongoing for a month now.<br> <br> This is unprofessional and a huge inconvenience,<br> <br> I iterate this, i am finished with the sonic. I do not want it anymore and demand a different car. What will happen next? On the way to the coast the engine will blow up again? Replace it that side and put in leave for a month? let my kids stand next to the road hot or cold?