Beware Cell C sells defective new cell phones

I upgraded my contract & Cell C gave me a defective new Honor400Pro cell phone out of the box. I only started using the unit 10 days after I received it as it was a gift for someone. Cell C don't want to replace it but repaired a new cell phone, when I insisted I want it replaced as it was new. No response from any manager to assist me or response to my complaint lodged. I am not allowed to get a email of the manager or regional manager to assist. Repair centre repaired the phone without my consent to make money when I insisted I don't want it repaired but replaced as it was supposed to be a new phone. The phone is now damaged from all the opening of it. Honor service centre & Cell C service both gave reports that the motherboard needs to be replaced on a brand new phone. Cell C insisted that even though Honor gave a report on the phone, I still need to go through them to confirm Honors report. Cell C gave the same outcome on the motherboard being faulty on a new phone, but instead of replacing the Honor 400PRO they repaired the motherboard without my consent to repair the fault.Ive been disappointed in the service of Cell C & wanted to return the phone as I no longer wanted it but it was to late & honestly don't want to be at Cell C. The service in resolving this has been non-existing. I want to close my Cell C account & contract as no urgency to resolve my query or return the unit they gave me.