SMD NOT DOING PAYMENT FOR VEHICLE.

My claim was rejected by insurance and my truck was towed to SMD Bloemfontein. SMD Centurion the contacted me and made me an offer for my truck. Pearl from SMD sent me the offer to be signed and all required docs needed. I couriered the required documents and also the original natiss document to them, they confirmed that this was received and submitted for payment on 1/10/2019. In their offer letter it stated that payments take up to 7 days to be done. It's the 4/11/2019 now and after numerous emails and phone calls they still have not paid me yet. I even got an email last week which stated the payment will be finalized in 48 hours which did not happen. From here on I am not sure what to do, they have my truck and registration papers and they are not paying me.