Vodacom Fibre NO CONNECTION NO AFTER SALES SERVICE

I am a Vodacom Fibre customer. I'm paying for a 25/25 mps fibre line (uncapped). Worst decision ever. I want to cancel my month to month fibre line with Vodacom. Then line keeps dropping connection and runs very slow. They don't have any after sales service. If you call the call centre they play music and a recording asks you to press numbers and you never get to speak to a real person, nor is there any link to cancel on their website. Please Vodacom, tell me who I can speak to in connection with cancelling my fibre and moving to another ISP.