Mouldy juice.

I bought juice from your store in cradlestone Mall on the 15/01/2020. It was Sir Juice 1.5L Guava. Upon returning to work I had some and then notices it had a sour taste, looking closer at the packaging I noticed mould on the bottle on the inside and the outside. The expiration date was for 09/01/2020. Today is the 15/01/2020. I drank juice that was past the expiration date and got some mould in as well. Returning to the store I was just told to to take a new one. On inspection of the other juices I noticed the same mould on some of the bottles. I found a juice that had a date for the 07/02/2020 and took that one as a replacement. I was then told all the old stock was removed, clearly not. Please have that store check cause finding mould is a no no.