Sim swap

I myself am a shift manager on retail for 3years and the worst thing u can do is to shout at a customer. I got ****** of my cellphone and other belonging's on the 22/10/17 been under a difficult month ever financially. Today I finally bought myself a new cellphone I just needed a sim swap I got to the store they ask me 5 security questions I only got 3 correct and after that I was denied service and I ask if there's really nothing that may be done so that I can retain my number I have more than 6years with it that's when a customer assistance lashed out on me...she even called her manager herself the manager got to the table still nothing was done even a simple sorry on the behalf of her stuff member I was left stranded and had to choose another service provider.