bad attitude , unacceptable customer service

I bought items on a lay bye and wanted to exchange a few of the items which didn't fit my daughter I lost my slip but the storis able to pick it up on there system.so I requested the slip in store from the manager charlene she refused to give me a copy so I could exchange the en called head office and they said they can't assit me I have to get it in the store no one at ackermans is able to ssist me in this matter.bad customer service in store and head officem no one is willing to help a customer and go the extra mile