Disgusted at the service recieved

On the 2nd May I took my time at the store and picked out a jersey I asked them to bring in my size from another store and they said it will done on Thursday at 11:28 I recieved an sms stating my garmin has arrived and I have 48hours to collect it. On Saturday I am in the mall parking and I contacted them to alert them I am in the mall and coming to fetch the garmin.this was around 10:45.am the manager tells me the garmin as been sold as it was put back on the rack in the morning. So what is Ur policy of 48hours. She then tells me she will offer me a 5% discount on the next set aside they will bring she remained unconcerned that she has wasted my time and petrol driving to the mall as I have no business in the mall accept fetch my garmin. This is the 2nd time this store has done this it's either they don't know their policy or how to read the Time. I support this store on a monthly basis and to be treated this way for a 2nd time is unacceptable. Is this how forever new treat their loyal customers. I am disgusted that Ur store manager doesn't know her own policy and send out messages to waste customers times and defend herself by saying its policy to put things back in the morning.