Pathetic customer service!!

On 22 February 2021, a Cell C contractor arrived at my doorstep to sell their Fibre services! He literally told me that Cell C is running a special. I can subscribe with one of the options , If I am not happy I can cancel before 31 March 2021 , at no cost to myself. After much debating and I was sold and took the R720 per month option. He promised he will assist with the installation etc., A few days later , MicroFribre technicians arrived to deliver the router. I then called the contractor to come assist with installation as he had promised! I called a few times only to realise that he has gone AWOL! I then decided to call Cell C customer care to enquire. I got the shock of my life when I was told that there is not "special" and should I decide to cancel I will charged cancellation fee!. I then tried calling the contractor again, still AWOL! I have not used the fibre or connected! I then received an invoice of R 821, due by 31 March 2021. I called the contractor again. This time he rep****, came to me to my house ,apologised and gave some lame excuses about a misunderstanding between MicroFibre and Cell C! He wanted to then assist but it was already too late! Cell C was charging me R 821 for a service I have not used. I called the retentions department to cancel. I then got a notification that my fibre will only be terminated end of April 2021, meaning I will still be invoiced for Fibre I have not used!! My REF is CF188815 ! Its not going to happen! The fibre needs to be terminated immediately! Is this how you market your services! I will not oay for your contractors lies! Cell C was so quick to issue and invoice and debit my account this morning with R821 , whilst I have sent several requests to be assisted! Its NOT going to happen!! I cannot pay for services I have NOT used! This is ridiculous!!