Huawei Melrose Pathetic service

Huawei Service center Melrose Arch is the service center I have dealt with. I took my device in for repairs as they were running a special for a screen and battery replacement for R699. I was abit surprised when they asked me to pay upfront, this even before assessing the device. Anyway, I paid the R699 and eventually I get an email with a quotation and report saying that I need an additional R2000+ for other damages to the device, do I accept or reject the quote. I did none, instead I contacted the service center and was told that the device was burnt on the inside, which I was so confused because how does a device burn on the inside? Nevertheless I asked to speak to a technician, whereby I was told that they don't speak to customers, yet the lady on the other end of the phone give me an"I don't know" answer. I then go and collect the device and deal with Nonie at this time and she explains to me why or how the device burnt inside and this is considered physical damage. By this point I understand and then reject the quote for the extra repairs. I then ask what happens to the R699 that I paid when I took the device in for the screen and battery (this not fixed either) I am devised that a refund will be made to me. I then fill out the refund form on the 2nd of November and till this minute haven't received any refund or feedback. Every time I call Huawei, I am kept on the line for an hour, still with no resolution or I get told that it will be done on Friday or it has been escalated to the head office. It is now a month later and I still didn't get my money. I spoke to Nonie, Johnson as well as the manager Anna and no1 bothers to return my call after dropping the call because I wait for over an hour. Their service is pathetic and I would not advise anyone to pay for any repairs before the phone is actually assessed. I have to phone after money that is owed to me like a debt COLLECTOR. PATHETIC SERVICE!!