Pathetic service received

I went to Vodacom in Secunda to cancel my contract in February that was ending and i was told that its ending month end. There was a deduction that was done in March when my contract ended as it was not funded and as a result i am charged a billing fee and interest on that device. I was not even aware that there was data and minutes loaded on a monthly basis on that sim as i was of an opinion that i took the device only. Now i had to pay money for something that i am not even utilizing with interest for a contract that was supposed to be ended in February. I called the call center to cancel my contract and Olivia did not want to assist me because she wants information i don't have coz i don't have the App meanwhile i gave her my account number, ID number, and contract cellphone number for verification and she sent me to the store again now its pillar to post now and im unable to cancel my contract. In your records you can see i was not even using the sim card and i find it unfair to pay the R693 just to cancel my contract and what makes it worse is to pay for something im not even using. I want my R693 reimbursed and contract cancelled its so unfair