Refusal of refund

I purchased a cellphone at mr price in Alexandra branch on the 5/10/18,I went to store to return it on the 10/10/18 because of its faulty,the salesperson by the name of Floyd said to me the phone needed an update its not faulty,but my question was the display wasnt faulty nd yet it was never updated,therefore I wouldnt take the phone thats faulty nd risk the 7 day return policy I then asked for a refund,he went to the manager(Isaac) who said they should book in the phone back to Vodacom to have it updated which he was advised by his area manager(Etienne) ,I mean the phone is only 5 days ,the CPA states verry well that within 7days a faulty unit should be changed or refunded,again how do you tell a customer that something is not faulty but needs an update if you dont have tools to check it,Im very dissapointed and rather angry at your service towards your customers.