Shocking Aftersales Service from Vodacom

I opened a Vodacom contract and explained that I would be going back to Canada till the end of 2023. They are taking money off my FNB bank account every month and I have repeatedly emailed and asked what my cellphone number and sim PIN number is? The person that asked for my bank statements and has been replying to me is ignoring me now since the first payment went off ? I’ve tried to contact Vodacom via social media but I can’t get assistance because it’s picking up a Canadian number. I am frustrated because they take my money but refuse to give me my cellphone number and sim PIN code, why? Why ignore me?