Vehicle repair

Renew-it Randburg have had my Jeep Wrangler since the 2nd March 2015<br> I was promised the vehicle back last week, I was then told I could get the vehicle back today.<br> They have said today that there is more damage on the vehicle that they didnt pick up, I cannot get the vehicle back. <br> Why did they not do a thorough inspection when they got the vehicle.<br> The vehicle went in for the repair they only realized now is a problem.<br> What have they done with my vehicle for 1 month<br>