cellc bad service

I have been a loyal customer of cellc for years now , my contracts come nearly R2000 a month i never missed a payment and in return wanted good service, but thats not what I'm getting lately, I tried to upgrade one of my lines to a laptop deal at a cellc store but they didn't have laptops in stocks I waited for weeks , so I decided to try online on cellc website, i spoke to customer agent, i clearly asked her is they have stock , she said yes , and promised delivery within a week that was on 30th of June 2020 its now the 10th and I still never received it, I never get an sms or email from cellc, so been days now I have been calling cellc to ask whats the delay no one seems to be able help me , i then sent a complaint and they told me some one will call me back its been days now and no one as even called me, i am very disappointed I have lost time and money due to bad service.