Horrible Service Ackermans at Boulders Mall

I phoned Ackermans at Festivall Mall to see if I can buy Samsung Galaxy grand prime plus in a white colour. Unfortunately they only have black colour and the lady advice me to find out from the other nearest branches. I phoned Ackermans at Boulders mall for several times the phone was answered but nobody was talking to me. All I could hear was a background noise from the staff chatting and laughing. I phone the customer care and reported the matter and they gave me the alternative number to speak to the manager. I tried again with no luck as the number was busy. Therefore, please advise if I have go to all the branches to find what I am looking for because nobody answered the phone from the nearest branch. Why are you making shopping in your stores to be difficult unnecessary? Do I have to close my account and take my business somewhere else?