Contract cancellation turned nightmare

I contacted Vodacom on Thursday to cancel my contract as it would a due to end in a few days. I was assisted by Simphowe Nxumalo, immediately after I spoke to her my cellphone number was blocked. I can’t make or receive calls. Mind you, I was advised that my contact cancellation has been scheduled and the last debit order will be on the 25th of Jan 2025. My account not owing anything and I do not understand why was my cellphone number cancelled. I have been calling since last week and have not received assistance, I sent an email and no response. The email reference number is ***. I’m so disappointed and frustrated by this.