continued line issues

My issue regarding my Telkom DSL line has not been fully resolved since my first support call was logged on 21 november 2015. so far, the calls were closed without actually fixing anything.<br> <br> 21 November 2015 : 246CTK211115 <br> 5 December 2015 : 531CTK011215<br> 19 January 2016 : 752CTK190116<br> 26 January 2016 : 104CTK260116<br> <br> Same issue, ping is more than 800ms. one cannot work like that.<br> <br> next, due to lack of response, i have sent in my notice of termination of contract (all required documents attached) of 21 January, 24 January, 25 January and now 26 January. the response mail says 48 hours. heard nothing. is this some sort of tactic to try and squeeze more money out of me while i do not have a functional internet line?<br> well i sent in my notice, i have received a mail that it was received by telkom and i will not pay anything beyond the notice period.