my vehicle not repaired within 2 months

Left my vehicle for repairs on 1 Feb 2019 after a walking-pace bumber bump. They say they received the parts on 25 Feb (not seen delivery note). In the "paint" phase since 22 Feb - it is now 13 Mar. The original delivery date was 19 Mar, which I thought was very delayed, and today, they just moved it on to 3 Apr. Their reason is "other". I think it was because I started complaining.

Gone is the 30day car rental from the insurance. I am now by foot and public transport.