FAULTY S8 RECEIVED ON DAY 1, STILL FAULTY AFTER REPAIRS

I do not know what to do anymore with my Samsung S8 I received from vodacom. I upgraded online and the device was delivered to me. Within the first day the device started freezing and rebooting on its own. I then went into the mall to the nearest Vodacom, and they said they can do NOTHING for me because the device was bought online and that I must call the call centre to resolve the issue. I then called the call centre, and they said that they will pickup the device from my office, in order to inspect it and do a replacement for me as it is still within 14 days. I waited, and called, and waited, and called again, and Vodacom just said they will be arriving within 5 - 7 business days. Guess what, THEY NEVER ARRIVED. This lead to my device being out of the 14 day replacement warranty already. I went into a Vodacom outlet AGAIN, and they booked my phone in for REPAIRS, and I waited 3 FULL WEEKS for my device to be "repaired". Ater going to get my device from the shop they said they replaced the battery. I switched on the device, and guess what... 5 minutes later the phone froze again and RESET. It is clear that nothing was done to the phone and that no testing was done. Vodacom BRAGS about their customers on the RED plans about getting this great service, I have received only *** service from them and I have a RED plan. I pay almost R20000 for this device over 2 years, and have not been able to enjoy it for 1 single day. I have to use my previous device with a broken screen while my NICE SAMSUNG S8 just sits on the table. I am fed up with this and demand a brand new device. Come on Vodacom, just show me that you really do care about your client and their issues. Especially being on a RED plan AND not having to enjoy a device you promote so highly.