Bad Customer Service and attitude

My husband was at Vodam Canal walk on the 25 April, applying for a modem contract, he was advised that he has been flagged and he cant have one but he will get some feedback and a call back by Teusday on the 28 April. on Teusday he contacted the Accounts department and was told that it will be clear.He called again to Canal walk and was told the lady busy with his query will contact him. Still no response by Thursday he was told it would be cleared in 30 minutes. On Friday we were in the store and was the told the lady busy with his query will be in by 4pm we must wait 4 hours. She called back yesterday being rude telling him to come back to the store before 12pm. HAving attitude with a customer screaming over the phone and waisting our time and money to drive up and down its really not fair.