No to Neotel -period

Ok so I've been having issues with slow/no bandwidth for the last 10 months. I contacted Neotel around September/October 2017 asking for assistance which in the last correspondence they informed me that someone would call -no one did. Now that I want to cancel my contract (after 10 months of painfully slow internet) I'm suddenly getting calls from Neotel. However the comment from Neotel about canceling my contract is 'Sorry but you did not follow up regularly through our call center so we cannot help you'. So please tell me this -is it my responsibility to continuously be calling them? And because I didn't thats now my problem. So for the next 5 months -and probably for as long as I can I will be spreading the (lack of) love from Neotel and the fact that I have already paid close to R10k for Neotels service and feel that its not even worth a 10th of that but they will still milk me for the rest of the cash. Game on Neotel -I'm going social with this you bunch of... .