Call centre not able to assist after having to hold for 25 minutes just to speak to someone

I have placed an order a couple of hours ago. I selected all item sizes. When checking out and paying for delivery, I received an order confirmation where I noticed the one size was incorrect. Seems like it defaulted back to the standard items. I phoned the call centre and after 24 minutes Minenhle answered and told me that this cannot be corrected. I would have to wait for my item and hope the size is correct, if not I would have to go to the store to exchange this item. I asked to speak to a supervisor. After holding for 10 minutes I was told that no supervisor is available. She tried to contact 2 supervisors Dalene and Michele. She did not apologize for me having to hold for 10 minutes and again told me that nothing can be done. I asked her if there is no one that she can phone or email to request the correct size being packed, and she said no. Now, I paid R45 for shipping and handling, only for having to have to go into the store in any case... I find it hard to believe that no supervisors were reached in 10 minutes and that I had to wait on the line for a total of 45 minutes. Terrible service. I will be cancelling my order and not supporting Mr Price in future as this level of customer service is simply disgusting.