Vodacom: Repairs keep getting delayed!!

I gave my phone in at the repair centre in Witbank on the 1st of August (Job Number: ***3) for a faulty screen repair on a Samsung Flip 5. The phone is still under warranty and I was assured the phone would be repaired in 7 - 14 days. On day 15 I was told that they needed to get another part and that it would be delivered Monday the 19th. I was then told it was on back order and there is no ETA. I phoned Vodacom Head Office and they told me that if they cannot find the part I would get a replacement phone, whichever is the faster to resolve the situation. I was then told that the part was found and I would have my phone by Friday the 23rd. Only to get the same message that the part is on backorder with No ETA.... It has been 25 days now and as much Pieter (The manager from the Vodacom repair shop) is trying to help me, nothing seems to be working. I honestly need my phone back and since they are struggling to get the part I feel I should get a replacement phone. This is a fault on the phone... it is nothing I have done.... The device is not even a year old... How am I supposed to accept this?? How is this okay??? I work from my phone... these past 3 and a half weeks have been a nightmare!!!