No feedback on a damaged product return from Makro for 3 weeks

I bought a car radio from Makro, when I received it and turned it on there was damaged to the screen. I logged a return on 06 February, the courier collected it on 09 February. On 16 February I enquired about the status of the return, Makro said the radio is with the supplier for QC and the will give me feedback. On 23 February I enquired again, however I have not heard anything yet. This is now almost 3 weeks to wait for a refund from a large supplier as Makro..... this is really poor after sales service and commitment from Makro