Worst service provider- can’t get my adsl line rental cancelles

Worst service ever!

I logged a cancellation request via the online portal 3 weeks ago, constantly for 2 days got spammed about every hour with a sms someone will contact me by close of business -even through the middle of the night!!! No one ever contacted me, now month end the next debit order went off AGAIN!! I contacted the client services for assistance, worst consultant ever! He was rude, told me he can’t assist me because the ‘new system’ my profile is on is offline, then he said I must contact Telkom AGAIN on my own costs. I lost it there because so unhelpful, I asked can he not log a query that they contact me again and he cut the call on me ???????? I need to get this contract cancelled!