No Service

On 20 August I went to Vodacom in Tzaneen Mall to Upgrade. I do all the paper work then the staff tell me that there is no stock they will order stock. The stock will be there on 24 August then I can pick up my phone. When I phone on Thursday the guy say they still waiting for stock I must wait they will phone me. On Sunday 27 August I went again to the store the guy on duty tell me he cant help me I must wait for the *** who help me previously. He will tell him to phone me on Monday 28 August. I phone in this morning left 'n message the tell me the guy is busy with clients. When I phone back after 3 hours he told me he cant remember me. So what must I do now. This is really bad service.