Furious customer

On the 28th of June I went to get a wife router deal at vodacom mams mall, everything went well, I was approved and signed. After everything the guy tells me that they do not have the router but it will be ordered and I will receive it after a week. A week passes, they are not saying anything about why I haven't received my router. On Sunday the 9th I told my partner to go and ask them what was happening he went then they gave me a call apologizing and the inconvenience. They guy who called said he will speak to his superiors to ask them if they cannot order the router from another vodacom, he then said he will call me before end of business on Sunday to tell me how it went his superiors. The day ended without me receiving any call from them. Today I tried to call them countless times and they are not answering my calls. Vodacom please fix this because end of the month I'm going to pay for the services I did not use.