Telkom salesperson fed me incorrect information

I recently purchased R100 Telkom airtime from Pick 'n Pay. I could not use this on my Telkom LTE router as I am on a contract (so the salesperson on the line told me). They advised that they add R99 to my next debit order payment and that Pick 'n Pay would refund me for my purchase. This was incredibly misleading as Pick 'n Pay is refusing to refund me. Telkom and Pick 'n Pay need to sort this out please, you cannot let the customer lose like this when they were assured they would be refunded.