error on salesmans path

I went into the Northgate branch on Sunday 12 July to purchase the giga200. The only reason I went into this branch is because they had stock, else I would never go there as it is out of my way. I had requested to purchase the giga 200 and to do a sim swop or number change, whichever was possible as I want to keep my existing cellc number. I was told this is possible to do. Makhosazana obviously did not listen to my request. She sold me the Giga 200, asked me to remove my sim card form my cellphone and then for some reason she did a number change or sim swop on another number. She promised to call me back on Monday to rectify the problem she caused as she could not resolve it right then and there. When she returned my call on Monday she advised that I have to come into store to rectify the issue. This is extremely inconvenient to do as I have mentioned I do not come to Northgate. I requested her to refund my money and come and collect the sim cards from me. That too she cannot do. She caused a mess and is not willing to compensate the customer. To top it off she is the manager of the branch. Such pathetic service!