I have an account with them which according to my understanding when the router is not paid the cut the internet, I’ve since used the router in July and later got another service provider, I called and asked them to cancel it by the end of July however th

I have an account with them which according to my understanding when the router is not paid the cut the internet, I’ve since used the router in July and later got another service provider, I called and asked them to cancel it by the end of July however they still continued their services whilst the router was plugged in since it’s got a direct power supply which was never disconnected, to my suprise this month I got an sms that I owe them and when I called to enquire they said I owe them R2900 which is ridiculous. I will not pay this amount and I am willing to take this matter to the small claims court and further take it to the Services Ombudsman because their Agent’s incompetence should not and will not affect my livelihood.