Need help or advice

I took out a 24 month contract in June 2018. Went to renew contract July 2020. I was told my contract ends in November 2021. I still have my invoice showing i took my contract in june 2018. Nobody can assist me went in to a Telkom store told there is nothing they can do from they side. They said they can open a case someone wil contact me nobody contacted me. I get a email saying my issue was resolved..... i don't know who or when had it resolved because i am still paying up till today and it wasn't a cheap contract i took an unlimited package with a Samsung s9 which comes to R1700. I dailed customer care nobody in customer care can help i am going in circles i don't know where to get help. If i put a stop order on my debit account it will effect my credit rating. I am out of options i desperately need help.