Nando's New Market cashier and manager's attitude and communication skill stinks

Good Day, am very disappointed and ****ed by the treatment i received from the cashier and the manager at Nandos New Market. Today its for the second time, the manager has a stinking attitude and she thinks she knows too much.. On the 21 May 2020 08:26 i made an online order and paid with the Vodacom voucher, when i arrived there to collect, the manager was like i did not pay, i should pay R49,i told her i paid with a voucher, then she logged in her system and saw my transaction.. Then todag i ordered full chicken online and used my Vodacom R50 voucher then paid R109 with my card, when i arrived at the store i told my husband to go and collect, when he arrived there, the cashier told him we owing R50, then i went in, i tried explaining to the cashier, then the manager n the other cashier started being rude and arguing with me, i tried explaining how i paid, they we like you have to pay the R50 thta you owe, when i explain it made things worse the manager was like coz you dont wanna pay R50 pay R109. It took +-5min while they were doing dialog with me, then the manager said okay lets go, we went from the till to her computer, were in she logged in and asked my number, then i gave her, she went in and saw that i paid in full, R109 via credit card and R50 voucher. Worse part she continued being rude and not apologized.. Just took my order and left.. Am ****ed and no longer going to order there anymore