Telkom is the worst

I had a Telkom contract that ended in march of 2021 all paid up with proof of payment never heard from them again and suddenly last month I was apparently in arrears with them with an amount of R283 I picked this up on my clear score app I then went into branch at canal walk and the agent couldn't tell me where that amount came from after more than three years but said it shows on the system and that I owe them that money very rude agent I am really upset about my credit score dropping due to this I never received one phone call or even a an email for this apparent arrears amount I have since just paid the amount but would advice anyone and everyone to not open Telkom contracts as I battled with them during my contract duration.