Bad service

I subscribed to Telkom for ADSL in my home. On Wednesday morning 11 December 2019, a technician installed the router at my house, he advised to call Telkom on 10210 to receive my username and password. I have been getting the run around with Telkom as the number allocated to me was discontinued and needs to be synced to my profile. Since Wednesday I have been advised to wait 24 hours, its been more than 48hours, this is unacceptable as I have to pay for these days that I do not have wifi. How do I cancel this contract?