Bad Internet connection, Bad service!

I was a client for Iburst for a few years and have always found their Internet connection super slooow and inconsistent. Because of this, I decided not to renew my contract which lapsed on 21/01/2016. I duly notified them on 07/01/2016 that I do not wish to renew my contract. Come February, lo and behold - they have renewed my contract unilaterally. I have written three subsequent emails to them on the 1st of February and now 24 hours later, I have not had any feedback from them.<br> The only thing more lethargic than their internet speed is their customer service.