Poor service on iPhone battery replacement.

Very unhappy with service of the Woodlands branch. My son handed phone in on 11 March. Asked them to check stock of batteries which they confirmed and confirmed his phone should be ready same day...which was same news given to him on the 9th. Now 2.5 weeks later, 5 follow up visits and numerous calls later they are still waiting for stock. Got emails initially stating there was delay of about 3 days. My son was also asked to give his apple password over the phone. Overall extremely bad experience.