Failed promise

I am experiencing terrible service from the Dstv contact centre. I made a call on the 19th requesting to sign up (Price Lock) and was promised a call back, I have since made 2 unsuccessful follow up calls and no one knows whats going on. My ID number is *** Cellphone *** i am still waiting for someone to call me as promised. I am an existing customer wanting to take up a new offer with them but the service is TERRIBLE