Worst Service EVER!!

On Sunday, 24 Jan 2016, we went to Game at Ilanga Mall in Nelspruit. On display was an air cooling unit advertised on the sign for R699. When we got to the cashier it rang up R929. This after 2 merchandisers on the floors confirmed the price to be R699. When the supervisor was called he referred the matter to the floor manager I assume? We were told that they will look into the matter and we just have to wait a bit. Waiting 5 minutes would have been enough. After 15 minutes she came back to us and said she cannot give the product to us for that price as the price was hand written on the advert card??? After this a third merchandiser came and told the manager as well that this is the price on the shelf. Still, after 3 employees confirmed the price still to action was taken. We were told that we have to take the product for the price it scans for. My question... since when is it the customers' fault that your staff didn't do their job? I feel that along with another product clearly marked down that also rang up incorrect, that some action should have been taken! The don't care attitude from the floor manager was unacceptable! Something needs to be done???