Delay and bad service

CMC Auto Panel is delaying in completing my car repair. They have already missed 2 dates.

They first given me estimation of completion date 24th January 2020 and missed this date and given me another date 31st January 2020 and missed this date as well and again given me 7th Feb 2020 but they not going to complete the work by this date as well.

The vehicle has been just standing there for weeks and weeks.