Fed up with Telkom

I have been trying to cancel my Telkom internet for 3 months now.

I have been calling the call centre requesting a cancelation letter for my internet only for 3 months to no success.

I have requested assistance to obtain a cancelation letter by logging in on my telkom account to no success either.

I reaceived a bill for 3 months payments being in arrears. Due to the fact that i have no internet access but im being billed for internet usage, wich according to my telkom account shows 0% usage since start of August..