Pathetic service from Game

So I had a purchased a microwave from Game at Gateway just over a year ago. And it had a 2 year warranty on it. After the purchase I had mislaid the receipt for the item. About 3 weeks ago the microwave wasn’t working and I had went back to the store and advised them of my problem. So the response was that I have to wait for 4 weeks for them to retrieve the slip and then only are they able to assist further. So on another day I went to Game in Westwood mall and asked the lady at the customer service inside the store at the back of the store, (description: young black , slim lady) to assist and after 45 minutes she comes back to me and says that there are only 2 people working at the call Centre and the call is not going through. So She also advised that she informed her manager that she contacted the call Centre and I must contact them myself because the call center is very busy. I called the call center and managed to get through after 10min whilst being in the store for over an hour waiting to speak to an agent. Bare in mind that the store was absolutely quite and not much activity. I did not get much joy, as the call center agent was unable to pick up the date of purchase with the information I had given. I went back to Gateway On another day explaining the same problem to get assistance . I spoke to a lady by the name Anisha for assistance and Anisha called Sanele who is the Admin Manager at Gateway to assist that just had a mumble over the phone and wasn’t interested. I had advised them of the inconvenience I had been going through, I have a 11 month old baby who needs his feed on time which needs to be warmed and his milk bottles sterilized time to time. Which needed to be sorted as a matter of urgency and it’s been days going. We have been loyal customers over the past decades and only to realize that we as customers have expressed our urgency was totally disregarded which was promised that someone will contact me to assist me through to resolve my issue. why does it have to be a challenge ??? Can I please get some after sales service !!! Do you’ll have the right people for the job ??? Nobody has contacted me to date , which makes me an orphan customer............ I await your urgent feedback