Worst service ever Telkom Cancel My contract

Canceled my 2 contracts a week apart more than 30 days ago, I got confirmation that my request was received and will be actioned. The contract that I canceled last is the one that had been terminated but the one canceled 1st is still running. I called the customer care and I was told that the is no trace of the cancelation after being on the phone for more than 20 min, I was then told that they could trace the request however they don't know why my line has been credited with data and airtime. Now I am receiving email telling about an upgrade.... TELKOM I DONT WANA HEAR ANYTHING, CANCEL THIS LINE WITH IMMEDIATE EFFECT, WHY DO WE NEED TO GIVE 30 DAYS NOTICE IF YOU WILL STILL NOT CANCEL.