Pathetic service n wrongfully charged

On11Jan16, I phoned4times and enquired about the handset,checking stock and price.I informed the consultant to keep a handset aside,as I was going after work.When I got to the store, the staff wasn't helpfull.Took them 15minutes to look for the handset,I got to the till after waiting in line.The teller charged me for the handset but didnt print all the till slips n said the payment from my debit card didnt go through n he had to do the transaction again.I got an sms confirmation stating that my account was deducted for the full amount.I showed the teller and I asked for the manager.The manager said there is nothing that they can do and that I will have to wait until the next day to see if the money clears.The manager was very rude with no customer relations or sense of management(if staff was properly trained,I wouldnt have had this error). Management said she cud not do anything further otherwise she will lose her job.I had to go back the next day to resolve.This incident costed me 1hour of my time also transport back n forth.I called 6times the next morning n then only the call was logged by the manager,who then said I had to wait 24hours for a response n I charged me again.