Incorrect billing and poor service delivery

I have been with this company for 6 years. They never ever changed my billinh date to my salary date.

The 3rd year they doubled my billing without my consent.

Tjis year i wanteda downgrade. They told me to cancel my existing package. I was told the new package was R395. In the first month of billing they chaged me R1495. 2nd month again R1495 I was told by the consultant theres a free ups not advised about delivery fee. They had doubled billed me and added a R200 delivery fee to my account and i was then later told we do not have a package of R395. Package starts at R495 For months i have been fighting for them to come collect their hardware and credit me.They continuously suspend your account and when you query them they want to split what you owe to pay off the account but not fix the account.

How do i report this to the FSP ?