Foshini bad customer service at head office

I'm so unhappy with Foshini. I phoned the customer service to change one of my plans on my account and the lady never informed me that if I changed it that it would have taken away my buying power. On Saturday I went to Foshini to purchase clothes for a function. At the till, the lady told me that I had to pay more than R300 more than the installment on my statement and she told me that I don't have any credit available. I felt so embarrassed. That Monday I phoned the customer service again and the guy told me that the lady was supposed to tell me that by making changes on the plan, it takes away your buying power which she never did. The agent said that the supervisor would listen to the recording and get back to me by the Friday which never happened. Today is Friday and I'm still waiting for it to be fixed. How difficult is it to change everything back to what it was so that I can have my available credit back. I even received a credit increase end of September which was taken away. This is very unprofessional and embarrassing for a customer. Trying to phone the customer service from a cell phone takes forever. It took me today 45 minutes on 1 phone to them just to try and get it fixed, and still I have to wait again