Wrongful accusation - Consumer Complaint for PEP STORES

Hi. I always send my business parcels via paxi at your pep(Johannesburg CBD). I recently received bad service from both the cashier and manager who didn't want to take responsibility for entering a wrong destination number. I gave the lady my phone to check the store number that I was sending to, then when I got the slip I told them that the number is wrong but instead of apologizing they gave me attitude and said I'm the one who gave them a wrong destination number which is absurd cause I always use that number. Now my clients are angry cause they have to wait 14 days for their package to be received