I have learnt the hardway

This is my second complain letter. <br> I called C-track (repairs centre) to come and replace the faulty unit during the week of the 20 April 2015. I was promised to call back after 30 min for arrangement, still no call back to date.<br> I made another call on 30 April 2015, I was promise a call back in 10 min time. Now the days are gone, not minutes. <br> I am learning the hard way. The vehicle is still standing awaiting for the faulty unit replacement. I am giving the supplier 24 hours to replace the unit , otherwise the vehicle will be back into the road . And I won't entertain your calls and messages. I have learnt the hard way.