Bad Customer service & Price difference

Special is 22 May 2019 - 09 June 2019 for 18 Twinsaver Toilet Rolls Plus 2 Duck Toilet Cleaner All for R110

Cashier C0328 #0003 10:06:17 090619 S007159 R19

It rang up as R164,?? I pointed the special out on the pamphlet. She starred at the pamphlet. Then showed it to the packer and both of the staring because the special is nearly for 3 weeks and none of them are aware of the special I notice the branch manager and went to her because the cashier did not bother to call a person for assistance.

Point is it was correct, but no sorry. My question: What does the NPA says about price difference in stores?

This is not the 1st time that I had problems in Checkers Hyper in Centurion Mall.