Can't even count 24 months

Hi All

This company as well as Telkom are the biggest ********** companies i ever came accross I signed a 24 month contract on the 30th of September 2018 and everyone knows that it well expires on the 30th of September 2020 yet they say no it expires in December 2020 how the hell do these people count than they send me threatening emails for 72 hour and 24 hour payments to be made when you reply on email you being ignorred by this useless demanding people who are just as useless as telkom mobile