Disappointed in Cell C

I am so disappointed with the service I received from Cell C. This is now my second upgrade with them and I honestly feel like I can just cancel everything. I upgraded last week on the day of the sale I spoke to a guy named Bonga who was very helpful called me back when he said he would and assisted me, he made empty promises saying I'd have my device on Friday. I called to follow up on Friday only to find out that he had **** to me about making a note the delivery was urgent on top of that he promised to call me back and didn't. I called this morning and was informed they do not have stock of what I wanted I mean this was never explained to me I then called again and was denied access to speak to a manager and called again and got through to Bonga who promised he would call me back and again this did not happen. When we were concluding the sale he called back every time he said he would now suddenly he forgets. Then I hear the routers are out of stock. Cell c is just disgraceful.