Poor service

On Sun 13.08.2017 we bought 2 loaves of Sunbake bread from Pick n Pay. The expiry date on the bread was 17.08.2017. On Mon evening when having the bread we found that half the loaf had black mould on it. We then took it back to Pick n Pay but they advised us to call the Sunbake customer care line. On Tues 15.08 we contacted Sunbake and was told the customer service agent was not available, we were asked to leave our number and that they will call us back, today is the 18 08 and we have yet to receive a call from Sunbake.