Webafrica

Hi so a few months ago I had a issue with webafrica fiber being set up at my house after I threatened to cancel I had a guy from webafricas rentions phone to make all these promises and send me an email to make sure I had it in writing today I get an email from webafrica stating that I owe them R750 I then send the email the rention guy sent to remind him that he still owes me a free month as stated in his mails I get an email back stating that he has left I still expect webafrica to keep his promises as it us not my fault he left