Layby issues

I took out a layby to the value of R720 on the 05/06/2021. On the same day I paid a deposit of R100. I made the first payment towards the layby on the 25/06/2021 to the value of R250 at the Mr Price in Cavendish, Cape Town. I then made a second payment of R240 on the 10/08/2021 at the same branch in Cape Town. My friend made the last payment for me to the value of R130 at the same branch. I am not sure of the date. I have proof of payment in the form of receipts and I can produce bank statements. It seems no one is interested in helping me. I have called customer care twice and every time I am told that I will be put through to the Canal Walk branch in Westen Cape, I am either redirected to the automated voice or there is an error in connecting the call.

Is there anyway I can receive legal advice on what to do next?