Phone contract gone wrong

I went to open a cellphone contract a month ago at Vodacom4u .I called prior to going to the store to ask if the phone I want is available and the consultant said he does have it and he will keep it for me as I will be coming in the afternoon . We complete the required paperwork for the cellphone contract and I pay upfront fee payment required from me . He then tells me that he just found out the phone he kept for me is now kept for someone else who will be applying a contract the following day .it didn’t make a sense to me because the consultant told me that the phone is available and i will get it the same day . I cancelled the vodacom contract because the store couldn’t keep their promise right .The consultant notifies me that I will receive my refund the following at 9 which didn’t happen . Until this day ,I am having a back and fourth with the store with regards to receiving my refund and I always need to do a follow up with both the consultant that assisted me and the manager which is ridiculous on my end .