OBF out of box failure.

On the 3rd of March my phone got ****** and I did a insurance claim. I received a new phone from on the 4th of March and the next day the 5th of March I took the phone back to Vodacom Repairs Menlyn for a OBF as the phone gets extremely hot at some stages and drains the battery, they tested the phone and tried doing a software upgrade which failed. So clearly they saw it is faulty now they said they sending it to Vodacom Repairs for another assessment for OBF. I spoke to repairs on the 8th of March to follow up and they still didn't receive the device but the lady assured me they will prioritize once received. I phoned today the 9th of March and a lady said they received it but they will only do the assessment tomorrow as there is no Samsung technician in today at Vodacom Repairs they only work every second day. I am really upset as I bought the phone from Vodacom took it back to Vodacom literally the next day I haven't even used it for a full day and now when the device is faulty they shift everything as if I bought it from Samsung if I knew this process takes so long I would have rather bought the phone from Samsung as Vodacom does not follow the consumer act. I am really upset I have been with Vodacom for more than 15 years and will definitely look at moving to another service provider after this. I am told it takes 7 days to resolve this and get it approved for a new device. Vodacom is inconveniencing me because of this ridiculous process.