Vodashop Westwood Mall

Two weeks ago I renewed my data sim contract. I dealt with a certain Furqaan. He processed my upgrade without enquiring about whether I had a duo sim linked to my card. I then found out that I could not use my duo sim. I visited the store and Furqaan assured me that he would activate a new sim. A week went by and it was still not activated. I then contacted the Manager of the store, a certain Devan who assured me that he would perform a sim swap. I visited the store again and Devan assisted me. It is now two weeks down the line and my sim still does not work. The only time they would make contact with me is when I called. Is this appropriate customer service? Devan does not respond to my messages and does not take my calls. Is this appropriate behavior for a Store Manager? I want Vodacom to resolve my matter as I have no time to chase *********** staff and Managers around to assist me. I want the store to deal with both Devan and Furqaan for poor customer service