Pnp northeast mall

We have just been to pnp nothmead mall in benoni where they advertise specials and when u get to the till you pay the full price no specials deducted as well as we bought cherries that's advertised as 63.99 on the shelf and when u check your slip you get changed 98. 99 so I desided I will call the manager at pnp after many tries they finally answered the call and when I spoke to the manager he made if I was a stupid and don't know how to look at the slip I said that's fine give me your number I will sent you the slip I can tell u now I will never go back to this pnp AS they like ripping of there customers and I will Wright a review ever day if this does not get sorted out