Replacement of non-working bulb

Hi<br> <br> I purchased a new Microwave from Makro Cape Gate on the 23 of August 2015. I noticed that the bulb was not working and phoned LG to advise me and the LG representative told me to go to Makro. I phoned Makro to be told that I need to bring the microwave in and then it can take 21 business days to repair,<br> <br> I cannot be without a microwave because we have a baby in the house and we need to warm up bottles etc. I am willing to take the microwave to a repairer to replace the bulb for me, but since I'm sure the bulb was broken from day one, I'm not willing to pay for the repair since I bought it brand new. I also want the microwave back on the same day.<br> <br> What am I to do??