CELL C FAILED ME with their poor Service

I've spoken to one of their consultants to do an UPGRADE over the phone we did everything on 04/04/2018 and she promised me that i will receive my new Handset between 2 -4 working days i was even provided with REF : SP ********** 454 to follow up on my order i phoned them again on Wednesday 11/04/2017 i received an email notifying me that one of their consultants will call me back within the next 24hrs till to date CELL C has never bothered to call me back i am fed with their poor service.