Woolworth's poor customer experience

I am utterly disgusted. Got 2 vouchers from dial direct and wanted use them. The teller tried a few times to load them. And was not successful. We waited 20 mins while she said she needs to call. Then we told her we cannot wait any longer we will come back. She said 15 mins. We came back 30 mins later to hear we cannot get hold of them. We have emailed them. She said she let her manager know and they will take my number. Why did the manager not come and speak to us? What good does that do me as a customer who wanted to purchase at your store ? I asked so we cannot use it till you get feedback. She said no. Not happy I need this resolved ASAP.