Transferred to 6 six departments with no help

I am trying to do a migration on my contract to a higher plan. I called customer care, they transferred me to the upgrade department, then I was tranferred to retentions, then I was transferred to after sales, then I was transferred to online upgrades, then I was told to call ***, I then spoke to Thembi that told me It is not possible to do it on my current promotional plan. Does none of your staff have any training or knowledge? I just repeated my ID number and home adress and type of account about 6 times. Really fustrating and unprofessional. Really irritated.