Scratch to vehicle

One of Servest Parking assistance scratched my car at the Eikestad Mall in Stellenbosch end of August. They asked me to get 3 quotes which I did and told me to have my car repaired, the quote included to repair the damage and blend due to metallic colour. After it was repaired they told me to send the invoice and they will pay, they went back on their word, all 3 panel shops quoted for a blend, they said they will only pay for the damage and not the blend, the blend is part of the damage!!!! My car was repaired only end of November after a lot of batteling to get the go ahead. It is now end of February and they still haven't paid the panel shop or reply my emails or phone calls!!! BAD BAD BAD!!!!!