Vodacom ********

I am very angry with vodacom, I had a continuation contract with vodacom since 2013 when I took my first contract with them, I never had a problem until this last contract I took in january 2019 which was for 24 months, some months I couldn't pay as I would be stuck in Lesotho because of border closure due to covid and my line was suspended until am back and able to pay full amount which I didnt have a problem doing, but this year when my contract supposed to end in January am told they added more month to it as my line got suspended twice and now my contract will end in October 2021, I went to vaal vodacom to ask about this as it was my first time hearing it, every sales person was surprised. Now my line is suspended again as vodacom claims am owing them and my name will entered into bad debts. Please help me because my contract was 24 months which I paid.