Worst service ever and refusing to return the car

<p>Our volkswagen tiguan broke down in April.  So we took it to G Tech Pro Auto after bad service from volkswagen rustenburg themselves.  They ended up rebuilding the engine over 12 weeks.  The work obviously came with a warranty.  Within two months, the engine was making awful sounds, we took it back, they said it was the lifters and started a warranty claim on the suppliers.  After waiting weeks for that, the car went into limp mode.  So they towed it back to them.  It has now been by them for seven weeks again, with no progress.  We have paid for so much work and so many parts and nothing is fixed.  After deciding to just call it quits and take it elsewhere, we are now struggling to get the car back from them.  Every time we arrive at the garage to pick it up it is still in pieces.  The car is actually driving, just noisy, so we keep expecting to drive it home and do not arrive with a tow truck.  The owner's phone is always off and the people at the garage say they do not know what is happening.  I can't believe they won't even give our car back!  Really the worst service ever!  We could get someone else to fix it if they would just give the car back!</p>