Pathetic customer service

I literally would not give you any stars if it were up to me. I have been trying to upgrade my phone for two weeks now. Please note that my phone is where I work from, so with my current phone acting up, your pathetic service has cost me money. Joseph first promised me a Samsung A3 when I called a week later I was told there is no stock. I had to change the phone which I did to an A11 and again I have been told there is no stock. Why promise me a phone I cannot get and not once but twice and never even follow up to let me know. I called so many times that my number has now been blocked at the call centre. No supervisor is even willing to hear me out? Pathetic service.