Vodacom is the worst

A terrible experience they never fail to give Cancelled my contract in may and served a months notice, at the end of June , I paid everything and asked for a paid up letter they promised to send it a few days later . They then failed to do so and in July they billed me again and I’ve still managed to pay that a few days ago and now when I try cancel I’m told my account is still active and need to be deleted and when I try they ask me for the number I’m calling for and being a fibre line , I don’t have and from there their systems just kick me out of the calls . I’ve been circulating from one person to the other and no one seems to be able to get this done and those that can , cannot be reached