Telkom theives - poor service and unclear billing

My 24 month contract was due for an upgrade and the telkom agents were hounding me to continue my contract despit my disparate attempt to explain how poor their coverage was in sandton. The coverage was so bad that my phone badically became dead weight at work. No calls or data could be used rendering my contract useless. At my home the coverage did improve however no attempt was made by telkom to improve their coverage in sandton (i called many times to complain). By the 20th month i recived a call from their call centre asking me whether or not i would like to upgrade. I clearly said no and that i would no longer be using this contract. The caller made no mention of sending through a cancellation letter but merely rep**** \ok". In the 25th month i was slapped with a bill 3 times the usual monthly amount. Apparently i am now paying the usual contract amount plus the discount i used to receive no longer applies so i get an added cost. None of these details were mentioned in the telephone conversations. I am horrified by this lack of consumer appreciation. Telkom is blindly ripping people off in order to fill their pockets. Stay away from their lies and deceit."""