Cancellation of my home fibre

Since beginning of December, I've been trying to downgrade my plan. Upon calling Vodacom fibre line, as they are my service provider, my request could not be logged through the call centre, I was sent a link to log my service request, I logged the request on the 9th of December, been calling ever since to follow up. Every time I call and get a consultant, I'm told different stories. The last explanation I got on the 20th of December was that I should wait for my plan to expire, on the 26th then call after 2 days max, to close the plan and open a new one. Till today I'm not getting any help. It seems I signed my life over to Vodacom/Vumatel as I can't even take up other home fibres whilst under these companies. There is no exact turn around time given, I'm helpless, these companies left a bitter taste in my mouth, and it's only a month using their services, I've wasted a lot of money calling their useless call centre, all I get are apologies and excuses