Extremely bad customer service

My experience with the pick n pay store in Chatsworth had me standing at a till for more than an hour for a transaction that didn't go through due to a system error, took 30min to get any feed back and I was told that head office is at their staff party could not assist me, as the customer I offered a solution, and was told that the manager of the store does not have authorisation to process the transaction and there I should come back, what's infuriating is that firstly head office should have solutions in place to cover any arising situations If they are not available, secondly if there is a store manager they should be able to authorise matters in order to have a solution and later on deal with head office ....after a good hour the assistant manager then takes my solution into consideration ...

Extremely dissatisfied with the process