Delayed repairs and appalling customer service

I took my car in assessment on 7 April and was told to bring in my car on the 15th and was advised that it will be ready on the 4th May. When i called in on the 4th i was told told the car is almost ready, in the paint workshop and that it will be ready on the 7th. When I called on the 7th, now the story changed that they are still waiting for parts. When i asked the manager about what he told me 2 days before, he says to me I didn't hear him properly and the car will be ready on the 12th. Its the 12th today and i had to call them yet again to request how far my car is. My car is STILL not complete and i am told it will be ready on the 14th. the damage on my car was very miniature and i shouldn't have had to wait a whole month for repairs. And the whole entire duration, no one is calling me to keep me updated and i have received no apology for the delays. I am extremely unimpressed and appalled at how this branch is treating its business and customers