Vehicle in for repairs for 3 weeks and a climbing

My Vehicle was booked in to Ford eagle corner 3 weeks ago, initial Diagnostic checks picked up a repair bill of +-R5k. A week and a half later my husband was called to say that further problems are picked up with a bill of R15K. On Friday 29/01/16 was called again to say more issues and bill is now R24K! Vehicle was promised to be ready early this week. it is now thursday with NO updates or correspondence from ford. How were major faults not picked up on initial diagnostic tests?! Is Ford Eagle corner totalling up a billing by chance? How is it taking them more than 3 weeks to repair a vehicle with No feedback and correspondence. This is unacceptable service and excuse the pun, but ford Eagle Corner are taking clients for a ride! Highly disappointed at the service and disgusted by the cheating of billing and repairs.