Not a good service provider

My 3 Cell C contacts for more than 10 year's Endless problems on account problem's. Try to cancel my first contract battled about 3 month's. Second contract battled about 1 year to cancel always issues get transferred from one agend to another month after month cancellation, department never answer wen you do get transferred , long stories you must pay this and that , pay account again in full month later still the same story. last contract due for upgrade, they dont want to upgrade contract they say im under dep review, (were im not clean dep record ) ok don't owing them 1 cent on contracts battled 3 months to Cancel . Now after 1 year suddenly handing you over non payment. not payment on contrac that was canceled not used and firts place cell c not wanted to upgrade your contract , have no statement from them or calls or Emails for one year ? But handing you over for non payment . Not a service provider i want to do business with after dealing and battled for more than 10 years .