Bad smart device call centre service

Worst phone manner experience EVER! and still after days of calling still could not do what i needed to, was actually so angry and exhausted on Thursday that I was left in tears after having to call numerous times and was then told that I dont have to get so angry?! Really? having to be transferred to different departments and just NEVER getting to speak to the right person. Ive been trying since Friday to speak to someone to just change my order on my smart device without any luck. Im sure ive gone through at least R200 airtime, asked that a manager call me back today and I was told that they would TRY???? TRY??? are you kidding me??? of co**** no one called.. Now im getting a TV delivered tomorrow that I really wanted to change but the service is so poor I just have to accept it now and take the delivery? Im so over FNB's service, supposedly a private client?? and this is the service I get. You guys should seriously make changes to your calling system because to try and call and speak to the right person has proved to be IMPOSSIBLE!! and stop offering smart devices through FNB because it is the most frustrating process EVER!